Matter in an ecosystem. A) Flows only one way B) is part of an open system C) is eventually lost as heat D) is broken down into chemical nutrients

d

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the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation: