Final answer:
The sperm produced by mosses require moisture to successfully reach an archegonium and fertilize an egg, as they are reliant on water for sperm motility.option b.
Step-by-step explanation:
The sperm produced by mosses require moisture to reach an archegonium. This is essential for their reproductive process as mosses, along with other non-vascular plants such as liverworts and hornworts, rely on a moist environment to facilitate the movement of sperm to the female reproductive organs. While mosses have methods of dispersing spores which may utilize wind, sperm mobility is strictly dependent on the presence of water.
Antheridia, the male reproductive structures in mosses, produce many multiflagellated sperm cells which are released into the environment. The female structures, archegonia, each produce a single egg located at the base. The presence of water allows these sperm cells to swim towards the egg, guided by chemical attractants released by the archegonium, facilitating fertilization.
Upon reaching the archegonium, the sperm travels down to unite with the egg, resulting in fertilization and the subsequent development of a zygote. This zygote will later grow into a new generation of the moss plant, beginning the cycle anew. Hence, moisture is the critical medium for the successful sexual reproduction of mosses.