Most primate species a. live in social groups. b. live solitary lives. c. are only social when predator activity is high. d. live in social groups only during the breeding season. Solution The most primate species live in social groups. They are very much important to ecosystems in which they live. They are one of the best pollinators as they feed on fruits and leaves as they move between trees. They pass the seeds in their dropings and allow plants to spread across a wide range. Gorillas, chimpanzees, bonobos,orangutans and various other species of gibbons are some of the examples of these primates..