1) What are the role of living things in the water cycle? a) Transpiration  b) Increase the water content c) Prevents soil erosion  d) Preven the soil 2) What role of living? a) Oxygen b) Respiration c) Photosynthesis 3) What are the balance ecosystem? a) Non-living b) Water, light c) Balanced d) Natural ecosystem 4) Interaction between organisms comprises........?  a) Prey-predator b) Mutualism c) Fungi d) Algae 5) Factor the influence population size in an...............? a) The presence of predators b) Change of water c) Source d) Disease

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