1. Which is a community of living organisms where they live and interact with each other in a specific environment? a. Population b. Biodiversity c. Ecosystem d. Habitat 2. Which plants provide shelter to animals in Intertidal Zones and Estuaries? a. coconut trees b. mangroves c. herbs d. shrubs 3. Which of these may lead to destruction and imbalance of ecosystem? a. reforestation b. recycling c. animal conservation d. water pollution 4. Which abiotic factor affects intertidal zones during the climate change? a. waves b, salinity c. temperature d. type of soil 5. Why is there a need to protect and conserve ecosystem? a. for healthy lifestyle c. to reduce animal habitat b. for business interest d. to increase natural calamities 6. Which activities can protect our estuaries and intertidal environment? a. use motorized boats c. planting marsh grass b. dynamite fishing d. nuclear bombing 7. Which of these activities can save the mother Earth? a. Proper waste disposal. c. Using synthetic fertilizers. b. Burning non-biodegradable materials. d. Deforestation and mining. 8. Why are intertidal zones and estuaries important? a. They preserve the balance of nature. c. They reduce waste materials. b. They destroy the environment. d. They produce carbon dioxide. 9. How can you protect estuaries at home? a. Replace dripping faucets. c. Throw garbage anywhere. b. Use toxic pesticides. d. Dump petroleum products into rivers. 10. How can estuaries in the water be protected? a. Cutting grass moderately. b. Using dynamite in fishing. c. Avoiding throwing your trash out to the sea. d. Pumping septic tanks.​