Algae plants mostly live in water and have simple structures. Some are single-celled and some are multi-celled, but none of them have roots, stems and leaves. "The spring color returns to the West Lake, and the spring water is green and dyed." It reflects the impact of the environment on organisms. When spring comes, the temperature rises, and algae in the water multiply. These algae float in the water, causing the spring water to ripple with green waves; bryophytes It has no conductive tissue, no roots, poor water absorption and water retention capabilities, and is suitable for living in a humid environment. "The moss marks on the steps are green, and the grass is green on the curtains." It describes summer, when there is more precipitation, the soil and ground are moist, and bryophytes multiply in large numbers. Even the steps are covered with bryophytes and turn green.