Leaf cutter ants cultivate fungus the ants keep condition optimal for fungus growth and carry leaf fragments for the fungus to grow then the ants feed on pieces of the fungus which kind of relationship exists between the fungus and the ants?

The relationship between leaf cutter ants and the fungus they cultivate is a mutualistic relationship. The ants provide the optimal conditions for the fungus to grow, and in return, they feed on pieces of the fungus. Both organisms benefit from this relationship, as the fungus provides a source of food for the ants, while the ants provide a suitable environment for the fungus to thrive.