Mosses start as spores (rather than seeds) which are released by adult mosses. The spores are carried away by wind. The ones that land in cool, dark, moist places then begin to grow by the same way plants do: photosynthesis . They take energy from the sun, carbon dioxide from the air, and nutrients from the soil, and create small fuzzy leaves. When they are mature, they grow stalks to release spores and reproduce, and the cycle starts over again!

Moss is a plant. It grows by taking carbon dioxide and water and making sugar and oxygen, like any other plant