IV. True or False. Write T if the statement is true or F if it is false. 21. Ecosystem is composed of living and non-living things that form relationship with each other. 22. The biotic component of an ecosystem includes water, air, soil, and sunlight. 23. Tropical rainforest is characterized as woodland composed of tall trees and thick vegetation. 24. There is a high temperature and high rainfall in a tropical rainforest. 25. Coral reefs are called the lungs of the earth because they produce large amount of oxygen that humans and animals need. 26. Coral reefs are mostly found in the shallow tropical seas. 27. Coral reefs serve as habitat for wildlife like lions and tigers. 28. Fringing reefs are circular reef system that surrounds a lagoon. 29. Mangrove swamps serve as breeding ground of different types of fish and are located along the coastal area. 30. Mangroves provide natural barriers protecting coastal communities from increased storm surg flooding, and storms.