Final answer:
The correct perspective that seeks causes of behavior in the functioning of genes, brain, and nervous systems is the biological perspective. It examines the physiological processes underlying behavior and contrasts with other perspectives like cognitive or humanistic, which focus on thinking and innate potential, respectively. The final answer option is 'b. biological'.
Step-by-step explanation:
The perspective that looks for causes of behavior in the functioning of genes, the brain, the nervous system, and the endocrine system is the biological perspective. This perspective examines physiological bases of behavior in humans and animals. It includes the study of the brain, immune system, nervous system, and genetics. The belief is that thoughts, feelings, and behaviors are a result of biochemical and physical processes within the body.
Another field related to this is epigenetics, which explores how genes and their expression can be influenced by experiences and the environment. Other psychological perspectives include the cognitive perspective, which focuses on human thinking, and the humanistic perspective, emphasizing the innate potential for good within all humans.
Behavioral perspective, on the other hand, posits that behavior is learned and influenced by interactions with the environment, rather than by genetic or biological processes. While each perspective offers a different approach to the study of psychology, the biological perspective specifically targets the biological underpinnings as the root causes for behavior and mental processes.
Therefore, the correct option in the final answer is b. biological.