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Difficulty: EasyCross-Author Inference

Passage A
Evolutionary biologists have long posited that juvenile play in animals serves a strictly utilitarian function: it is a rehearsal for adult survival behaviors. Under this "practice theory," kittens pouncing on balls of yarn are honing their hunting techniques, and wolf pups wrestling are developing the combat skills necessary for establishing dominance and defending territory. Natural selection dictates that animals would not expend valuable calories and expose themselves to predators through play unless it conferred a distinct evolutionary advantage. Thus, the seemingly frivolous antics of young animals are actually serious, genetically programmed drills. From this perspective, every leap, chase, and mock bite can be mapped to a specific adult task required for finding food, evading capture, or mating. The survival-practice model elegantly explains why play behavior is ubiquitous across mammalian species: it provides a safe, controlled environment for acquiring the physical dexterity and neurological coordination essential for navigating a hostile world.

Passage B
The deeply entrenched notion that all animal play is merely a dry run for adult survival skills is increasingly at odds with observational data. While it is tempting to view a wolf pup's wrestling as combat training, this strictly utilitarian framework ignores the sheer exuberance and unstructured nature of much animal play. Observers frequently document animals engaging in spontaneous, creative behaviors—such as otters repeatedly sliding down mudbanks or ravens dropping and catching twigs in mid-air—that have no clear parallel in necessary adult survival tasks. Furthermore, play often involves deliberate self-handicapping and extreme energy expenditure that can temporarily increase vulnerability to predators. A more plausible explanation for these behaviors is that play is intrinsically rewarding. Current neurological research suggests that play stimulates the release of dopamine and reduces cortisol levels, serving primarily as a mechanism for stress relief and social bonding. Rather than being a rigorous evolutionary training program, play may often be an end in itself—a hedonistic pursuit that benefits the animal emotionally rather than strictly preparing it for the rigors of hunting or fighting.

Based on the passages, how would the author of Passage A most likely interpret the behavior of the otters described in Passage B?

  1. As an activity that, while appearing entirely unstructured, likely helps develop physical coordination or other traits necessary for survival.Answer
  2. B
    As an intrinsically rewarding action that primarily serves to reduce the otters' cortisol levels.
  3. C
    As a complete refutation of the practice theory, requiring a new evolutionary framework to explain it.
  4. D
    As a genetically programmed drill specifically designed to establish social dominance and defend territory.
  5. E
    As a necessary method for cleaning the otters' fur to maintain its waterproof and insulative properties.

Answer

The correct answer is the option stating that the behavior likely helps develop physical coordination or other traits necessary for survival, despite appearing entirely unstructured.
The author of Passage A argues that animal play has a strictly utilitarian function and confers a distinct evolutionary advantage. When confronted with an example of play that seems unstructured or 'frivolous,' such as otters sliding down mudbanks, Author A would predictably maintain their framework by asserting that the activity must still provide an underlying survival benefit, such as improving physical coordination and dexterity.

Step-by-Step Solution

1
Identify Author A's core thesis regarding animal play.
Author A argues that all animal play serves a strictly utilitarian function and is a genetically programmed drill that prepares animals for adult survival behaviors.
Understanding the fundamental stance of an author is required before predicting their reaction to new information.
2
Analyze the specific behavior mentioned in Passage B.
Passage B describes otters sliding down mudbanks as an example of spontaneous, exuberant play that seemingly lacks a parallel in adult survival tasks.
The question stem asks specifically about Author A's interpretation of this exact behavior.
3
Apply Author A's framework to the behavior from Passage B.
Because Author A believes that natural selection dictates play must confer a 'distinct evolutionary advantage' (like physical dexterity), they would argue the sliding behavior must secretly or ultimately serve a utilitarian purpose, even if it looks frivolous.
Cross-author inference requires strictly applying one author's stated rules to the other author's examples without compromising the first author's core beliefs.

Key Concept

Cross-Author Inference: Applying one author's conceptual framework to a specific piece of evidence provided by the other author.
Estimated Time:1m 15s
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Cross-Author Inference

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