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: All humans are animals.

Given the two facts above, answer the question "what might leave an environment to find food and water if those things decrease?" with the following options: 
- bears
 - humans
 - pigeons
 - Lobsters
 - grass
 - clouds
 - h2o
 - omnivores


 

  humans       