Fact 1: If the amount of available food and water decreases in an environment then animals may leave that environment to find food and water. Fact 2: Human beings are animals. Given the two facts above, what may leave an environment to find food and water if the amount available decreases?

pick from the following.
[A]. bullfrogs
[B]. Lobsters
[C]. squids
[D]. omnivores
[E]. oceans
[F]. trees
[G]. humans
[H]. clouds
The answer is:
[G].