Animal researchers refer to the process of filtering out sights, scents, and sounds that have little effect on survival as
a. aggression.
b. desensitizing.
c. nurturing.
d. habituation.

The answer is option D. Habituation. Habituation is the process of filtering out sights, scents, and sounds that have little effect on survival. Habituation is the diminished response of animals to certain stimuli that are deemed unnecessary or irrelevant in the process of of survival.