Fact 1: Evolution occurs in response to a change in the environment.

Fact 2: Animals react instinctively to changes in their environment.

Given the two facts above, answer the question "What occurs in animals as they respond to changes in their habitat?" with the following options: 
- starvation
 - evolution
 - arousal
 - relocation
 - resistance
 - dependency
 - Leptospirosis
 - Movement


 

  evolution       