Angiosperms are a group of flowering plants that produce seeds enclosed within a fruit. They are the most diverse group of land plants, with over 300,000 species, including familiar plants like roses, oak trees, and grasses. Angiosperms play a crucial role in ecosystems, providing food and habitat for various organisms. These plants are characterized by their reproductive structures, which include flowers and fruits. The flowers attract pollinators such as bees and butterflies, facilitating the process of pollination. Once pollinated, the ovary of the flower develops into a fruit, which protects the seeds and aids in their dispersal.