How might planting trees near a riverbank be beneficial to the ecosystem?

Trees are critically important to the ecosystem generally, not least as oxygen-producers and carbon dioxide capturers, cleaning pollution from the air. However, they also provide a number of specific benefits in their role as riparian buffers. They slow runoff from rainwater, reducing erosion, flooding, and pollution.

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x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.