Some of them, however, are very different. The shape of the monkey's mouth is important. Whether or not the teeth are bared is also important. Watch out when a monkey seems to smile. This could mean that the monkey is threatening you.
Monkeys threaten by baring their teeth.
List three ways monkeys use to communicate with one another. Use a dictionary if you have one to look up the words. If necessary you can find a dictionary in your nearest public library. Write a sentence explaining this term in your own words. Monkey's smiles and human smiles mean different things.