Correct option (c) symbiosis
Explanation:
Mycorrhiza(mykes mushroom + rhiza = root) represents a symbiote; association of fungi the roots of the higher plant. Mycorrhiza meaning fungus root is an infected root system arising from the rootlets of a seed plant. In ectomycorrhizae, tire ult.mate absorbing rootlets of the root system is completely surrounded by a distinct mantle or sheath of fungal tissue. In endomyccrrhiza, there is ro such sheath. Most of the iungus is vrithin the root and may be intracellular well as intercellular.
