The correct answer is reproductive part.
The mushroom belongs to the family of fungus. It is composed of two parts one underground part called as mycellium and the other part which can be seen above the ground. This part is the reproductive part of mushroom which is often edible. The other parts of the mushroom includes stem, hypae, volva, spores, gill, ring cap. There are variety of mushrooms available but all the forms are not eatable some of them are poisonous to human health.