13. Why are coral reefs important?
A. provide rich sources of marine food
B. protect the coastal areas from strong waves
C. provide passage for strong currents to coastal areas
D. serves as a breeding ground of fishes and other forms of marine life
14. Mangroves are important for all these things except
A. along arctic coastlines
C. along temperate coastlines
B. along rocky coastlines
D. long tropical and subtropical coastlines
15. How can you restore denuded forests?
A. conservation
B. deforestation
C. reforestation D. kaingin system
16. The following are the ways of conserving and protecting wildlife EXCEPT
A. protecting marine sanctuaries
B. supporting projects in protecting wildlife
C. joining organizations about wildlife conservation
D. using products made from body parts of animals, such as furs and horns
17. Which of the following destroys the marine ecosystem?
A. fishponds
C. dynamite fishing
B. reclamation
D. constructing man-made sanctuaries
18. The fisherman in the barangay use dynamite in order to have a big catch. If this practice
continues, what do you think will happen to the marine resources?
A. Fishes will multiply fast.
C. Marine life will decrease.
B. Marine life will increase.
D. The corals will multiply.
19. What is the main reason for the diminishing rainforest area in the Philippines?
A. climate change
C. deforestation
B. dynamite fishing
D. erosion


B. Directions: Below are some activities of people. Check (/) those activities which protect
an ecosystem and Cross out (X) those activities which disrupt the cycles of an
ecosystem.
20. tree planting
21. gathering of corals for ornaments
22. muro - ami fishing
23. hunting wild animals for souvenirs
24. recycling and reducing solid wastes
25. joining campaigns such as "Adopt a River", "Bantay - Dagat", "Clean and Green"​