Final answer:
Large primate groups are beneficial as they can increase the early detection of predators, offering protection and increasing the survival odds for the individuals within the group.
Step-by-step explanation:
True, large primate groups are advantageous because they increase the likelihood of early predator detection. This is because being a member of a larger group provides protection to each individual from predators. Additionally, in the case of birds, a scolding call made by small birds can be heard by large predator birds, which is a favorable trait that has been naturally selected. Similarly, mammals like wolves hunt in packs, increasing their chances of obtaining food. Moreover, certain behaviors that may seem to lower individual fitness, like a squirrel chattering to warn others, could evolve because they indirectly increase the overall fitness of the groups they warn, promoting survival of the species.