This is established on the basis of phyologenesis (origin), biochemistry and anatomy. Fungi are recognized as one of the developmental lines within the Opisthokont supergroup, one of six into which nuclear (eukaryotes) have been divided, which includes animals, among others.
Like animals, fungi are heterotrophic and feed on organic nutrients in their habitat, which they usually break down by releasing enzymes, making them soluble and accessible to them.
A common feature of fungi and animals is the production of polysaccharide glycogen as a storage substance, while plants produce starch.
Although fungi, like plants do not move, in the animal world there are individuals who spend most of their lives in place, such as sponges or hard corals.
