Here's why:
* Predatory implies a relationship where one organism (the predator) benefits by killing and consuming another organism (the prey).
* Mutualism is a relationship where both organisms benefit.
Examples of mutualism:
* Bees and flowers: Bees get nectar from flowers, and in the process, they pollinate the flowers, helping them reproduce.
* Cleaner fish and larger fish: Cleaner fish eat parasites off larger fish, getting a meal and keeping the larger fish healthy.
* Oxpeckers and zebras: Oxpeckers eat ticks and other parasites off zebras, getting a meal and keeping the zebras healthy.
Let me know if you'd like more examples!