Which of the following best describes an angiosperm?

An angiosperm is best described as a plant that produces flowers. This characteristic is key to defining angiosperms, which are a group of flowering plants that are known for their ability to produce seeds enclosed within a fruit. The presence of flowers allows angiosperms to facilitate reproduction through pollination, which can occur via wind, insects, birds, and other agents. This adaptation contributes significantly to their diversity and success in a variety of environments.

Other descriptions, such as a seedless plant or a non-flowering plant, do not accurately represent angiosperms as they are defined by their flowers and seeds. Similarly, referring to angiosperms as a type of fungus is incorrect since angiosperms are classified within the plant kingdom and have distinct biological traits that separate them from fungi. Therefore, the defining feature of flowering and seed-producing capability sets angiosperms apart from other plant groups.