Final answer:
Non-human primate communication systems are diverse and complex, involving various vocalizations, facial expressions, and body postures.
Step-by-step explanation:
Non-human primate communication systems are diverse and complex. While they do not have a language system like humans, they use a combination of vocalizations, facial expressions, body postures, and gestures to communicate with others. For example, monkeys and apes use various vocalizations such as calls, grunts, and screams to convey different messages. They also rely on visual communication, which involves facial expressions and body movements to express emotions and intentions. Overall, non-human primate communication systems are intricate and allow them to effectively interact with members of their social group.