L. Choose the letter of the correct answer in each number. 1. Which among these is an example of a natural ecosystem? A dam B. grassland C. subdivision D. wheat field 2. Which among these is NOT an artificial ecosystem? A con field B. dan C. swamp D. 200 3. Which is an example of an abiotic factor in an ecosystem? A animals B. decomposers C. plants D. temperature 4. How do epiphytes (air plants) depend on large troos? A. They get food from the large trees. C. They get extra support from the trees. B. They climb high enough to absorb air. D. They cling on large traes to get enough sunlight 5. What is the main reason for the diminishing rainforest area in the Philippines? A climate change B. deforestation C dynamite fishing D. erosion 6. Which statement below is NOT a reason why certain plants and animals live together in a particular ecosystem? A Both plants and animals compete for food. B. Animals fürd the trees a good place to live in C. Plants and animals depend on each other in order to survive D. Both plants and animals are able to meet their needs in the habitat. 7. What makes up a coral reel? A algae B. Finnestone C.rocks D. sand 8. Which of these is called the rainforest of the sea? A beach B. Qoral reefs C. estuary D. lagoon 9. How can mangrove plants tollerate salt water? A They do not absorb salt water. C. Their bark is made up of salt-proof material B. They use salt and water to make food. D. They filter salt from the water using their roots. 10. Which is NOT a function of mangrove roots? A filter out salts C. absorb and store sal forn the water B. build up shorelines D. remove impurities and pollutants from water​