"Among our ancestors, those who feared animals, darkness, and heights were more likely to survive long enough to reproduce." The person who believes this espouses the explanation of the development of phobias.

Evolutionary

Explanation:

Since the early days, human has managed to learn and adjust to his environment, worked on developing and nurture the greatest feasible habits and mechanisms for survival.   Survival was of the greatest priority, as prehistoric cavemen were living in a multitude of dangers, varying from infections to wild, starving animals, etc. As per the evolutionary psychology, our ancestors had psychological upsides, transferred these behavioral traits to subsequent generations, culminating in a generation that then had these adaptive behaviors phobias.

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