Is It a Fungus or a Mineral?

I'm the dummy who doesn't know that evergene plants and fungus, but it's astonishing to me to imagine any living thing growing underground. I always thought mineral was getting way too big of a billing there. And with with this other category of fungus, like this is a particularly weird one even for fungus. The truffle wraps small hairs around the trees roots like a kind of loose neck glove. Then the tree provides the truffle with sugars and other nutrients through this cellular glove, which is called a heart egg net. And then in return, the truffle forms a huge network of hairs called hyphy that absorb water and minerals for the tree to use,. Which expands the reach