An example of commensalism

Remora fish and sharks

Explanation:

Commensalism is the biological association between two organisms whereby one benefits and the other is neither harmed nor benefitted.

A good example is Remora fish and sharks. The remora fish attaches itself to the shark bodies and feed on crumbs of leftovers food eaten by the shark, also get protection from the shark, while the shark is absolutely unaffected.

The shark and the remora fish

Explanation:

The Remora fish possess a disk on its head that aids in it's attachment to larger animals for example the shark and whales.

The remora feed when the large animals feed and this works by the detachment of the remora to eat the extra food from the large animals meal.

this would be called the responsiveness