Answer:
Gametophyte
Step-by-step explanation:
Mosses are classified as bryophyte plants. In bryophytes, the gametophyte phase is the dominant stage of the life cycle, unlike vascular plants (pteridophytes, gymnosperms and angiosperms). Gametophyte in bryophytes is independent of sporophyte and also more complex. In the other plant groups, in turn, the gametophyte is less complex and usually nutritionally dependent on the sporophyte.