What characterizes angiosperms?

Angiosperms are uniquely characterized by having seeds that are enclosed within a fruit. This feature differentiates them from other plant groups such as gymnosperms, which bear seeds exposed on cones. The presence of fruit not only aids in the protection of the seeds but also plays a crucial role in dispersal mechanisms. Fruits can attract animals, which help transport seeds away from the parent plant, enhancing the chances of successful germination and growth in suitable environments. This adaptation has enabled angiosperms to thrive in a variety of ecosystems and become the most diverse group of plants on Earth.

The other options do not accurately reflect characteristics of angiosperms. For instance, angiosperms are known for their flowers, which are crucial for reproduction, and they are not limited to aquatic environments; they can be found in numerous habitats, including terrestrial environments. Furthermore, while some angiosperms are evergreen, there are many that are deciduous, meaning they lose their leaves seasonally. Thus, the description that all angiosperms are evergreen is also incorrect.