Final answer:
Gigantopithecus is the extinct species of ape among the options provided. All other species listed, including orangutans, humans, gorillas, chimpanzees, and bonobos, are extant.
Step-by-step explanation:
The extinct species of ape mentioned in the options provided is Gigantopithecus. Gigantopithecus was a genus of large apes that lived in Asia, thought to have gone extinct around 100,000 years ago. In contrast, the other apes listed (orangutans, humans, gorillas, chimpanzees, and bonobos) are all extant species. Orangutans, though somewhat solitary, are native to Indonesia and are arboreal, meaning they live in trees. Gorillas, which exhibit a high level of sexual dimorphism, reside in Central Africa. Chimpanzees and bonobos, both African species, share a more recent common ancestor than humans. Notably, chimpanzees are closely related to humans, with our evolutionary paths diverging between 5 to 7 million years ago.