What are pheromones?

Pheromones are indeed chemical signals that are produced and released by an individual organism, which then affect the behavior or physiology of other individuals of the same species. These chemical substances serve various purposes, including attracting mates, marking territory, signaling alarm, or alerting others to food sources. The effectiveness of pheromones lies in their ability to convey specific information through chemical means, making them a crucial component of intraspecies communication.

Visual signals, auditory signals, and physical signals involve different sensory modalities and do not encompass the chemical nature and functional role of pheromones. Hence, they do not accurately describe how organisms communicate regarding behaviors or responses within their species.