Some chimpanzees show up to learn signal language to talk to their keepers. 1 popular illustration is actually a chimp called Nim Chimpsky (a pun within the title of your popular linguist Noam Chomsky). One way to provide them with enough brain stimulation is to deliver them lots of obstructions https://chancepxvrm.blogsidea.com/43562896/detailed-notes-on-monkey