Final answer:
The left planum temporale is generally larger in right-handed individuals because the language functions are localized in the left cerebral hemisphere for most people, influencing right-side motor functions. The correct option is B.
Step-by-step explanation:
The left planum temporale is generally larger in individuals who are right-handed. Language functions are predominantly localized in the left cerebral hemisphere for approximately 95% of the population, regardless of whether they are left-handed or right-handed.
This is due to the lateralization of brain functions, where the left hemisphere, which is responsible for language in most people, influences motor functions on the right side of the body and vice versa, through the corpus callosum connecting the two hemispheres.