Final answer:
Chemical communication in biology uses hormones and pheromones as signals. Hormones regulate bodily functions, while pheromones affect the behavior or physiology of others within the same species.
Step-by-step explanation:
The type of communication that uses hormones and pheromones as chemical signals is known as chemical communication. Hormones are secreted into the bloodstream and influence the function of distant organs, playing a critical role in maintaining homeostasis in the body. Pheromones, on the other hand, are chemical substances released into the environment by an individual and received by another individual of the same species, leading to a specific reaction, such as a behavioral or physiological change. Pheromones are commonly used in animals for a variety of purposes including mate attraction, territory marking, alerting others to dangers, and coordinating social behaviors.