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

Fact 2: Ethologists study animal behavior.

Given the two facts above, answer the question "What studies how animals behave in their natural environment?" with the following options: 
- resistance activities
 - that material's properties
 - it keeps an organism warm
 - A computer
 - it's state
 - behavioral studies
 - electromagnetic energy
 - by making heat


 

      behavioral studies   