The answer is C.
The message the author is trying to convey in this exceprt is that human action has already harmed the environment significantly by causing a large increase in the extinction rate for many animals.
The author advocates for humans to take specific action to avoid further destruction of the already damaged environment.
Answer:
uhm... give me a sec I'm working on it, I've never use this strategy before
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Because of, due to, consequently, if then, since, so, thus, as a result, therefore.