Which interaction BEST illustrates the concept of mutualism?

The interaction between clownfish and sea anemones best illustrates the concept of mutualism. In this relationship, clownfish receive protection from predators by living among the anemone's stinging tentacles, while the anemone benefits from the clownfish's presence, which helps to keep it clean and may provide nutrients through waste. Both species gain advantages that enhance their survival, showcasing the mutualistic nature of their interaction.