Ans.
Angiosperms are vascular, flowering plants that produce seeds, enclosed in ovaries. Reproductive structures of angiosperms are present in flowers, which include male reproductive structures (stamens) and female reproductive structures (carpels).
Stamen includes anther (where pollen grains are produced) and filament, while carpel includes stigma, style, and ovary (where eggs are produced).
Thus, the correct answer is 'flowers.'