Answer:
The correct option is: a) They are the largest ape, knuckle-walkers, vegetarians, and aggressive.
Step-by-step explanation:
Gorillas are the largest herbivorous, highly intelligent great apes that are closely related to humans as the DNA of the gorillas is 95 to 99% similar to that of human beings.
They are the knuckle-walking primates that are capable of walking bipedally for small distances and can also exhibit aggressive behaviors.