Within the underwater environment, an ecosystem is a self-sustaining community of plants and animals. In this systems, water and carbon and oxygen through the tropic levels of a foods chain, less energy is obtained with each secretive level.
Thus, all living things require oxygen in order to perform cellular repletion. So, the water cycle consists of water from steams, rivers, and run offs while evaporating into the atmosphere, and returning s water to the land.
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Sincerely,
leonard.wilson2008@hotmail.com
Len Wilson
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