Fact 1: Ethologists usually study how animals behave in their natural environment.

Fact 2: Ethologists are scientists who study animals in their natural habitats.

Given the two facts above, answer the question "what do scientists study?" with the following options: 
- solid, liquid, gas
 - microorganisms
 - electromagnetic energy
 - animal behavior
 - biological diversity
 - an object
 - an organism's body
 - metabolic reaction


 

    animal behavior     