Fact 1: If a habitat can no longer support animals then those animals will move to another area.

Fact 2: Animals are dependent on plants for food and habitat.

Given the two facts above, answer the question "What needs to be lacking for a creature to change habitat?" with the following options: 
- warmth
 - inedible plants
 - wind
 - oxygen
 - nektar
 - food
 - O2
 - dirt


 

      food   