Food is a significant factor for living in any kinds of animals. In female primates, this food gives them the energy for gestation and lactation. There are not only mother primates who are taking care their offspring, father primates are doing so. But these father may do for their young rather than their offspring. They both will look for food and handle it to their offspring or young. So, there are three significant key factors of acquiring food in any primates. The first factor is quality, which refers to “food’s providing energy and protein that are readily digestible” (162). This quality has an impact on primates’ options. For example, some kinds of monkey, such as leaf-eating monkeys, can eat both mature leaves and grasses, which contain
