What is one of the major types of algae mentioned?

Chara is a major type of algae known for its role in aquatic ecosystems. It is a form of green algae often found in freshwater environments, and it plays a crucial role in maintaining aquatic health. Chara can provide habitat and food for various aquatic organisms, contribute to the oxygen cycle, and help stabilize sediments on the bottom of water bodies. Its structure resembles some terrestrial plants, which can lead to confusion, but it is uniquely classified within the green algae category.

The significance of Chara in aquatic environments highlights its ecological importance in nutrient absorption and water quality improvement. Understanding its characteristics aids in recognizing the broader types of algae and their respective roles in the ecosystem. Other options represent different categories or classifications within the aquatic ecosystem but do not fall under the major types of algae as Chara does.