Which one of the following characteristics distinguishes angiosperms from gymnosperms?

Angiosperms are flowering plants that produce seeds within their ovary, which develops into a fruit. Fruits are a defining characteristic of angiosperms and are not present in gymnosperms. Gymnosperms, on the other hand, produce naked seeds that are not enclosed within an ovary. Tracheids, leaves, and cotyledons are not unique to either group and are found in both angiosperms and gymnosperms.