phenotype is correct because its physically characterized.
The correct answer is C. It is a sudden change that causes species to become extinct.
This answer is not correct because evolution occurs over a long period of time, as evidenced by the theories that describe its timeline (including gradualism and punctuated equilibrium). Additionally, evolution does not always involve the extinction of a species, but it can.
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The removal of insects would mess up the food chain. Many animals rely on insects as a source of food and energy. Eventually everything would die off.
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