Answer:
Phrenology
Step-by-step explanation:
The term that BEST describes the study of the skull that Gall's theory proposed is "phrenology". Phrenology is a pseudoscientific theory that suggests that a person's personality traits, intellectual abilities, and moral character can be determined by studying the shape, size, and bumps on the skull. Gall's theory was based on the belief that different areas of the brain were responsible for different mental functions and that the development of these areas could be inferred from the shape and size of the skull. However, modern neuroscience has shown that this theory is not accurate, and phrenology is no longer considered a valid scientific theory.