Answer:Here are the answers to your questions based on environmental science and ecology:1. Which of these provide valuable medicinal plants?B. mangrove2. They produce oxygen and:C. coastal areas (Both mangroves and corals contribute to oxygen production, but coastal areas may be the best fit here.)3. Which provide materials for construction purposes?D. tropical rainforests (While mangroves can provide some materials, tropical rainforests are more well-known for this.)4. The following are hatcheries of fish, crustaceans, and other marine life except one. Which is NOT?A. forests (Forests do not serve as hatcheries like estuaries and mangrove swamps do.)5. Which are found along mudflats?B. mangrove swamps6. Which consist of close-growing trees and other plants?C. mangrove swamps (Mangroves are specifically adapted to coastal environments with dense growth.)7. Which trap sediments washed from the land?B. mangrove swamps (Mangroves are known for stabilizing coastlines and trapping sediments.)8. How do we protect tropical rainforests, coral reefs, and mangrove swamps?B. Join in community clean-up drives.9. Why do people need to protect and conserve coral reefs, mangrove swamps, and tropical forests?A. to balance nature10. A. to balance nature