Brain localization of function was first suggested by the study of

A) philosophy.
B) phrenology.
C) biology.
D) behavior genetics.

Phrenology was a now-discredited approach to psychology that attempted to understand the mind by examining the shape of the skull. It proposed that different areas of the brain were responsible for different personality traits, and that the size of these areas could be determined by examining bumps on the skull. While this theory was ultimately debunked, it helped to pave the way for more scientific approaches to understanding the localization of brain function.