two examples of mutualism?

Question

but not a bee and a flower or a fish

Answer 1

lichen on a tree

worm and tree

Answer 2

Protozoa that live inside a termite digest wood for the termite and get a place to live with a steady food supply. The termite gets its food digested.

Birds that pick ticks and other insects off large animals like rhinos, giraffes, or cattle get a food source without have to search for it very much while the larger animal gets parasites removed from its skin.