Here's a breakdown:

* Commensalism: A relationship where one organism benefits from another organism, while the other organism is neither harmed nor helped.

Example:

* Barnacles on whales: Barnacles attach themselves to the skin of whales. They benefit by getting a free ride and access to food. The whales are not affected, as the barnacles do not harm or help them.

Let me know if you want to explore more examples or other types of symbiotic relationships!