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

Fact 2: Monkeys are very social animals.

Given the two facts above, answer the question "what do ethologists study?" with the following options: 
- plant life
 - monkeys
 - geography
 - Movement
 - h2o
 - humans
 - weather
 - parasites


 

  monkeys       