Answer:
Mutualism
Explanation:
Mutualism refers to mutually beneficial interactions between different organisms.
The acai tolerates the feeding of caterpillars, which then possess nectar that acts as food for the ants. The ants protect the caterpillars and the tree.
The tree benefits from the presence of the ants. The ants benefit from the caterpillars, and the caterpillars benefit from the ants and the trees.