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Difficulty: EasyParagraph-Level Transitions

For centuries, travelers in deep forests have reported witnessing an eerie, soft green glow emanating from decaying wood. Known colloquially as "foxfire," this natural phenomenon is caused by bioluminescent fungi that produce light through a chemical reaction. While researchers have long understood the chemical basis of this glow, they struggled to explain its evolutionary purpose, questioning why a fungus would expend valuable energy to shine in the dark.

[1]

A team of researchers discovered that the green light attracts nocturnal insects, such as beetles, flies, and wasps. These insects crawl over the glowing mushrooms, inadvertently collecting spores on their bodies, and subsequently distribute them throughout the forest floor. By shining in the night, the fungi ensure the dispersal of their offspring.

Which choice provides the most effective transition from the preceding paragraph to the paragraph that follows?

  1. A
    Bioluminescent fungi are found in tropical regions, they are beautiful to look at in the dark.
  2. B
    Many species of mushrooms are edible, but others are highly toxic.
  3. A recent study finally provided an answer to this mystery.Answer
  4. D
    A recent study finally provides an answer on this mystery.

Answer

The correct choice is the phrase that states a recent study finally provided an answer to this mystery.
The preceding paragraph ends with a question about the evolutionary purpose of bioluminescent fungi. The following paragraph begins by describing a scientific discovery explaining how this glow helps disperse spores. The correct choice transitions smoothly by stating that a study provided an answer to this mystery, linking the question directly to the answer. It is grammatically correct, using the past-tense verb to match the narrative and the correct preposition 'to' after 'answer'.

Step-by-Step Solution

1
Analyze the relationship between the two paragraphs.
The first paragraph ends by introducing an evolutionary question (why fungi glow), and the second paragraph begins by presenting the research findings (the discovery of insect attraction for spore dispersal).
The correct transition must logically bridge this question-and-answer relationship.
2
Evaluate each option for rhetorical effectiveness and grammatical correctness.
The option stating that a study provided an answer to this mystery fits the context perfectly and is grammatically sound.
It maintains past-tense consistency and uses correct idiomatic preposition usage.

Key Concept

Paragraph-Level Transitions
Estimated Time:1m 0s
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Topics

Paragraph-Level Transitions

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