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Set 5: Central Ideas (Intermediate)

Explanation

Answer: A

PASSAGE

The following text describes the importance of Biodiversity. Biodiversity refers to the variety of life on Earth at all its levels, from genes to ecosystems. High biodiversity boosts ecosystem productivity where each species, no matter how small, has an important role to play. For example, a larger number of plant species means a greater variety of crops; greater species diversity ensures natural sustainability for all life forms. Loss of biodiversity threatens food security, health, and stability.

Why is high biodiversity beneficial for an ecosystem?

A. It keeps the ecosystem looking aesthetically pleasing✓ Correct
B. It boosts ecosystem productivity and sustainability
C. It ensures that only the strongest species survive
D. It reduces the need for water and resources

Detailed Explanation

Choice B is correct. The text states: 'High biodiversity boosts ecosystem productivity' and 'ensures natural sustainability for all life forms.'

Key Evidence:

• "boosts ecosystem productivity"

• "ensures natural sustainability"

Why others are wrong: A (Not mentioned), C (Not mentioned), D (Not mentioned).

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