Final answer:
Primates rely on manual dexterity, stereoscopic vision, and a larger brain relative to their size. However, they rely less on their sense of smell compared to other mammals.
Step-by-step explanation:
Primates rely extensively on manual dexterity, stereoscopic vision, and a larger brain relative to their size. However, they rely less on their sense of smell compared to other mammals. Primates have a reduced snout and a relatively small area in the brain for processing olfactory information, indicating a reduced reliance on smell.