Answer:
Most people have seen a fungus/fungi. Mushrooms are the "fruit" of fungi.
Explanation:
The earth is full of fungi, that is why when animals excrete waste or leaves fall every autumn, they disappear in a few months. Fungi feed on them and return them to the soil as nutrients. Molds and mushrooms are fungi. But most fungi live underground because they work as decomposers and give nutrients to nearby plants or the soil. Similar to earth worms.
