Primates have a large brain for their body size. Compared to other mammals, primates devote more brain area to ____ and information processing, and less to ____.

A) hearing; smell
B) emotion; senses
C) smell; touch
D) vision; smell
E) touch; vision

Primates have large brains for their body size and devote much brain area to vision and information processing, and relatively less to other senses such as smell. This is because primates are visually-oriented animals and depend heavily on their visual sense for navigating their environment and social interactions.