Final answer:
The sporophyte of moss is the diploid form of the plant that grows out of the structure that produces the egg. It has a capsule that releases spores under favorable conditions.
Step-by-step explanation:
The sporophyte of moss plants is the diploid form of the plant that grows out of the structure that produces the egg, called the archegonium. It has a spore-producing structure with a stalk and a capsule that releases spores under favorable conditions. The capsules often have teeth surrounding the opening that assist in the dispersal of spores by the wind.