Question

in the early 1800s. franz gall proposed his theory of phrenology, which is the study of: bumps on the skull that could reveal a persons mental abilities and character traits. fluids in the brain called humors, which he believed controlled personality. the relationship between body shape and personality. brain chemicals called neurotransmitters, which are responsible for behavior and thoughts.

Explanation:

Phrenology, as proposed by Franz Gall, is a historical pseudoscience centered on the idea that skull bumps correspond to mental faculties and character traits. The other options refer to unrelated concepts: humoral theory, somatotyping, and neurotransmitter function, which are not part of phrenology.

Answer:

A. bumps on the skull that could reveal a person's mental abilities and character traits.