an insect that lives and feeds on the body of an alligator an ant that lives on a plant and defends the plant from other insects a bird that migrates to follow the movements of the butterflies that it eats a deer that eats one kind of plant, which allows another kind of plant to grow in its place
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which relationship is mutualistic?
Possibilities:
- an insect that lives and feeds on the body of an alligator
- an ant that lives on a plant and defends the plant from other insects
- a bird that migrates to follow the movements of the butterflies that it eats
- a deer that eats one kind of plant, which allows another kind of plant to grow in its place

an ant that lives on a plant and defends the plant from other insects