A team of researchers compiled brain data from more than 140 non-human animals. to study why primate brains are larger than other vertebrates.In the study, the researchers not only considered the socialization of primates, such as race size, social systems and mating systems.Their eating habits were also studied, and whether they ate leaves, fruit or omnivores.According to the researchers, dietary habits are the main reason for the large size of the primate's brain.
The statement "Of the more than 140 primates, fruit-eating animals have significantly larger brains than leaf-eating animals; The brains of omnivores are also larger than those of leaf eaters" best supports the above conclusions if correct.