3. Mangroves are a group of trees and shrubs that inhabit the intertidal coastal zone. Why are mangrove plants important? A. They increase erosion.
C. They serve as nurseries for fish species.
B. They are good source of wood.
D. They provide home to supernatural beings.
4. What will happen in an ecosystem if we fail to protect and conserve them?
A. There will be loss of biodiversity.
B. Animal species will continue to exist.
C. Weather will remain at optimum level.
D. There will be clean air and abundance of resources.
5. The Philippine archipelago is well known for its species-rich coral reefs, but warm waters, ocean acidification, overfishing, and physical degradation destroy these coral reefs? Which of the following practices destroys coral reefs?
A. use of fishnet
C. stop sewage
B. dynamite fishing
D. responsible snorkeling and diving
6. Disturbing an ecosystem's equilibrium can be detrimental to all living things relying on it. Which of the following destroys the forest ecosystem?
A. reforestation
C. planting trees
B. deforestation
D. using paper wisely
7. What are the ways of conserving and protecting forest ecosystem?
A. deforestation
C. regulated and scheduled tree cutting
B. kaingin system
D. proper use of forest goods and woods 8. Coral reefs shield coastlines from the adverse effect of wave action and tropical storms, provide many marine species with habitats and shelter, and the source of nitrogen and other important nutrients for marine food chain. How can we protect coral reefs?
A. anchor boats on reefs
C. touch coral reefs when diving
B. practice muro-ami
D. check active ingredients in sunscreen​