The answer to your question is C,"Climate". (':
Prey Definition:
Any animal that is killed and eaten by another animal.
<span>Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.</span>
2 - Human refuse to stop polluting.
All other three are attempting to attack the problem of pollution.