What term refers to the interaction where two or more species benefit from resembling one another?

The term that refers to the interaction where two or more species benefit from resembling one another is Mullerian mimicry. In this type of mimicry, two or more unpalatable or harmful species evolve to resemble each other. This resemblance helps reinforce their avoidance by predators, as predators learn to avoid them based on their shared warning signals.

For example, if two different species of toxic butterflies look similar, a predator that has a negative experience with one will likely avoid the other as well. This interaction is mutually beneficial, as it increases the chances that both species will survive by reducing the likelihood of predation.

The other concepts mentioned involve different types of species interactions. Commensalism describes a relationship where one species benefits while the other is neither helped nor harmed. Mutualism is when both species benefit, but it does not specifically refer to resembling each other. Parasitism is a relationship where one species benefits at the expense of another, which contrasts with the mutual benefit seen in mimicry interactions.