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 "There are what who study how animals behave in their natural environment." with the following options: 
- infants
 - heat or cold
 - insects
 - sensory neurons
 - scientists
 - people
 - humans
 - reptiles


 

     scientists    