Final answer:
Mosses primarily use spores, rather than sperm, for dispersal because moss lacks sperm and spores have a higher survival rate.
Step-by-step explanation:
Mosses primarily use spores, rather than sperm, as a means of dispersal. There are a few reasons for this. First, moss lacks sperm, so it cannot rely on sperm for dispersal. Second, moss spores have a higher survival rate compared to sperm. Spores are small and can be dispersed by the wind over large distances, allowing them to reach new habitats and germinate. In contrast, sperm are highly animated and have limited ability to survive and move far.