The way that animals have adapted to survive is ... but the other organism is harmed. Commensalism is a relationship in which ...

Commensalism: Commensalism occurs when one organism is positively affected by the relationship while the other organism is not affected, either negatively or positively, by the interaction.

If only one partner benefits, and the other is not much affected, the relationship is called commensalism. Consider barnacles that attach themselves to whales. The whales aren't harmed ...