Which term refers to a sign stimulus that triggers social behaviors between animals?

The term that refers to a sign stimulus triggering social behaviors between animals is "releaser." Releasers are specific stimuli in the environment that elicit specific responses or behaviors from other animals, often related to social interactions. These stimuli can be visual, auditory, or chemical (like pheromones) and play a crucial role in communication and social bonding among animals. For instance, certain mating calls or displays can act as releasers that prompt courtship behavior in potential mates, facilitating species recognition and reproductive success.

The concept of a releaser is vital in understanding ethology, which is the study of animal behavior. Releasers contribute to the innate responses of animals by providing clear signals necessary for social interactions, such as aggression, courtship, or parental care behaviors.