You are presented with the question "When food and water decreases, what increases?" and the following answer choices: 
- energy usage
 - heat energy
 - Migration
 - Temperature
 - Pollution
 - forces
 - root growth
 - deforestation

Now knowing that if the amount of available food and water decreases in an environment then animals may leave that environment to find food and water and many animals migrate, traveling to avoid bad weather, to find food, or to reproduce, choose the best answer.


 

   Migration      