Final answer:
The very largest primates tend to eat primarily plants and fruit. While most primates are omnivorous, larger species like gorillas and other great apes prefer fruit, an adaptation that dates back to when their ability to see in color helped them survive by selecting ripe fruits.
Step-by-step explanation:
The largest primates primarily eat plants and fruit. These primates, including those such as gorillas and other great apes, often rely on fruit as their preferred food source.
This choice is largely based on historical dietary patterns where the ability to see in color allowed primates to spot and select ripe fruits in their environments, an adaptation vital for their survival.
Most primates are omnivorous, yet the larger species have a diet that leans more towards herbivory, with fruit being a major component.
In contrast, humans, also part of the Order Primates, eat a large amount of highly processed foods, grains, and vertebrate meat, which has affected the evolution of our teeth and jaws, making them smaller compared to those of other apes.