Fungi are more closely related to animals than to plants.
Why it is true
DNA analysis shows that fungi share a more recent common ancestor with animals, breathing oxygen and releasing carbon dioxide, unlike plants.
Source: Mycology Today
Would you rather be asked first?
This is the reading side of the site, so the answer is in the sentence above — that is the whole point of it. Test yourself works the other way round: the question comes on its own, and the fact and the explanation only appear once you have answered.
Related facts
Nature
Fungi share a more recent common ancestor with animals than they do with plants.
Nature
Fungi are evolutionarily closer to animals than to plants.
Nature
Trees communicate with each other through underground fungal networks.
Nature
Trees communicate and share nutrients through underground fungal networks.