Correct Answer: B. Absence of tail
Solution:Apes are characterized by the absence of a tail, distinguishing them from other primates like monkeys, which have tails. Apes, including humans, chimpanzees, gorillas, and orangutans, have large cranial cavities, erect postures, and no prehensile tails, which are features of some New World monkeys. The absence of a tail is a key characteristic that helps differentiate apes from other primates.