C
A community is a group of animals that coexist in the same environment
B. some species die out when environmental changes occur
The answer to your question is called terminal velocity.
Survival of the fittest. If one organism thrives better in an enviornment and the other organism struggles, the one that is more adapted will obviously play a part in helping the less adapted organism die out. Food is a major point along with other aspects
<span>Species because it narrows it down to one thing.</span>
