* Clownfish and Sea Anemones: The clownfish lives among the stinging tentacles of the sea anemone, which protects it from predators. The clownfish, in turn, provides the anemone with food scraps and helps keep it clean.

* Bees and Flowers: Bees collect nectar from flowers, which they use as food. While doing so, they pick up pollen and transfer it to other flowers, aiding in pollination. This benefits both the bees and the flowers.