Answer:
A rainforest is a luxuriant, dense forest rich in biodiversity, found typically in tropical areas with consistently heavy rainfall.
A ciral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. Most coral reefs are built from stony corals, whose polyps cluster in groups.
A mangrove swamp is a distinct saline woodland or shrubland habitat formed by mangrove trees in brackish tidal water. They are characterized by depositional coastal environments, where fine sediments collect in areas protected from high-energy wave action.
