Ethologists usually study how animals behave in their natural environment, and many ethologists capture their observations on videotape or audio tape. Given these facts, scientists study animal behavior through which of the following among the following options:
- audio and video tape
 - Electrical energy
 - irradiation
 - A computer
 - raising their temperature
 - Something coming from a gland
 - The bending of a ray of light
 - characteristics


 

 audio and video tape        