Answer:
Behavior
Step-by-step explanation:
There are many ways by which individuals of the same species recognize mates to copulate. Individuals usually recognize other individuals of the same species by morphology. However, the recognition of individuals of the same species can be complex when there is great similarity between different species, as it happens, for example, in flies. In these cases the recognition of specific behaviors can be essential. Behaviors can include movement, vocalizations, sounds etc.