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Question

Difficulty: EasyIdentifying Main Ideas and Supporting Details

An environmental feature detailing conservation practices in Costa Rica presents the following overview:

"The National System of Conservation Areas developed an ambitious biological corridor initiative designed to connect fragmented rainforest habitats across rural landscapes. While initial conservation policies focused exclusively on isolated national parks, biologists observed that isolated reserves restricted animal movement and created genetic bottlenecks for species such as jaguars and tapirs. By offering financial incentives and technical support to private landowners who maintain native tree cover between parks, the corridor network successfully facilitates wildlife migration, improves regional biodiversity, and strengthens ecological resilience."

Which of the following best expresses the primary main idea of the passage?

  1. A
    Costa Rica has decided to replace its national park system with private agricultural land holdings.
  2. Biological corridors connect separated forest habitats to support wildlife migration and regional biodiversity.Answer
  3. C
    Jaguars and tapirs suffer from severe genetic bottlenecks when confined to isolated wildlife reserves.
  4. D
    Private landowners receive economic subsidies solely to plant commercial timber species across rural zones.

Answer

Biological corridors connect separated forest habitats to support wildlife migration and regional biodiversity.
The correct response accurately synthesizes the core message of the passage: the biological corridor network was developed to link fragmented forest patches, thereby enabling animal movement and promoting ecological resilience across the region.

Step-by-Step Solution

1
Analyze the scope and central focus of the text
The text explains the establishment, mechanism, and broad ecological goals of Costa Rica's biological corridor program.
Identifying the subject and primary assertion allows distinguishing the overarching thesis from individual examples.
2
Distinguish the central thesis from supporting details and unsupported claims
Connecting fragmented habitats to facilitate migration and enhance biodiversity represents the central thesis, whereas species examples and landowner incentives serve as supporting details.
A main idea must encompass the full purpose of the passage rather than focusing narrowly on a single supporting fact.

Key Concept

Identifying the main idea of a journalistic environmental report
Estimated Time:50s
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Topics

Identifying Main Ideas and Supporting Details

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