Evolutionary theorists have suggested that human beings may have a natural aversion to bitter tastes because many lethal poisons have a bitter flavor. This natural ability to learn an association for biological reasons is called . a. preparedness b. stimulus discrimination c. blocking d. a learned aversion e. instinctive drift

a. preparedness

Explanation:

Preparedness: In psychology, the term "preparedness" is determined as a concept that is being developed to elucidate why specific associations are learned by a person more easily as compared to others.

Example: Phobias associated with survival including snakes or heights are much easier & common to persuade in the laboratory as compared to any other kind of fear.

In the question above the given statement represents "preparedness".