5
lesson pretestMultiple Choice

Pretest

Question 5 • CMS 2026-2027 Biology CREDIT RECOVERY

Which best explains why a decrease in the types of insects in an ecosystem reduces the sustainability of the ecosystem?

Answer
A
There will likely be fewer insects that harm plants, causing an increase in plant diversity.
B
The biodiversity of the ecosystem cannot be protected by laws unless there are a certain number of insect species.
C
Organisms that depend on insects may not survive, eventually harming all the organisms that are interconnected.
D
Having fewer insects allows other organisms to use the resources that the insects were using.

Explanation

Insects are part of interconnected food webs and may serve as food, pollinators, or other essential resources for organisms. If insect diversity decreases, organisms that depend on particular insects may struggle to survive, which can affect other connected organisms in turn. This chain of effects makes the ecosystem less sustainable, so the best choice is “Organisms that depend on insects may not survive, eventually harming all the organisms that are interconnected.”

AI-written and checked against the verified answer.

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