1

Set 3: Central Ideas

Explanation

Answer: C

PASSAGE

The following text is about urban gardening. Rooftop gardens are becoming a common sight in big cities. These green spaces do more than just beautify concrete buildings; they help reduce the urban heat island effect by absorbing sunlight. Additionally, they provide local residents with fresh produce and create safe habitats for birds and insects, proving that nature can thrive even in a metropolis.

Which choice best summarizes the benefits of rooftop gardens discussed in the text?

A. They are primarily used to decorate tall buildings
B. They cool cities, provide food, and support wildlife
C. They are cheaper to build than traditional parks✓ Correct
D. They replace all supermarkets in city centers

Detailed Explanation

Choice B is correct. The text lists multiple benefits: 'reduce the urban heat island effect' (cool cities), 'provide... fresh produce' (food), and 'create safe habitats' (support wildlife).

Key Evidence:

• "reduce the urban heat island effect"

• "provide local residents with fresh produce"

• "create safe habitats"

Why others are wrong: A (Too specific (misses functional benefits)), C (Not mentioned (cost not discussed)), D (Too extreme/Inaccurate).

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