Which term is used to describe the influence of past evolutionary processes on current behavior?

• A. Ultimate causes
• B. Proximate causes
• C. Distal causation
• D. Reciprocal causation

Answer: (A)

The main idea being tested is the distinction between explanations of why a behavior exists versus how it is produced now. The term that describes the influence of past evolutionary processes on current behavior is ultimate causes. These explanations focus on the adaptive function and historical selection pressures that shaped the trait across generations, showing why it persists in a species. For example, a cautious or fear-based response can be understood as an ultimate cause if it helped ancestors survive and reproduce, thereby becoming common in the lineage. In contrast, proximate causes explain the immediate mechanisms behind the behavior—brain circuits, hormones, learning, or development—without addressing the evolutionary history. Distal causation and reciprocal causation refer to related but different concepts, such as longer developmental histories or bidirectional interactions with the environment, rather than the primary evolutionary history that ultimate causes describe. So, ultimate causes is the best fit.