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, answer the question "what may leave an environment to find food and water if the amount available decreases?" with the following options: 
- bullfrogs
 - Lobsters
 - squids
 - omnivores
 - oceans
 - trees
 - humans
 - clouds


 

       humans  