You are presented with the question "Ethologists usually study how animals do what in an ecosystem?" and the following answer choices: 
- raising their temperature
 - retaining heat
 - reducing acid rain
 - protect plants
 - share properties
 - behave in their homes
 - storing water
 - Generating heat

Now knowing that ethologists usually study how animals behave in their natural environment and students take a field trip to an ecosystem to observe the homes of animals in natural habitats, choose the best answer.


 

      behave in their homes   