Answer:
AngiospermĀ“s seed have outer protection and an endosperm
Step-by-step explanation:
Mosses reproduce through the use of spores. The angiosperms reproduce by seeds, seeds offers many advantages, they have outer protection, a shell that protects the inside from damage, desiccation and adverse conditions. Seeds also have endosperm as nourishment for the embryo instead the spore doesn't have any built-in system to help a new mosses begin the growth process.
Angiosperms didn't need to rely on the wind or water to spread their pollen around, they need a pollinator.