Commensalism
Commensalism explained in an easy to understand way:
Imagine you're hosting a casual dinner party, and one of your friends brings along a plus-one you weren't expecting. This unexpected guest enjoys the food and socializes, benefiting from the event, while you, as the host, don't particularly notice their presence nor feel any inconvenience. This situation is akin to commensalism in nature, where one species, like the unexpected guest, benefits from the interaction, while the other species, like the host, remains unaffected.
Practice Version
Commensalism: A relationship where one species benefits but the other is neither helped nor harmed. Commensalism. In commensalism, one organism benefits while the other is not affected in any way.