Answer:
Rivers usually begin in upland areas, when rain falls on high ground and begins to flow downhill. They always flow downhill because of gravity. They then flow across the land - meandering - or going around objects such as hills or large rocks.
Explanation:
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The animals dont get what they need so the oxygen does not get fed
The source of inorganic fertilizer is from plant or animal based materials that are either a byproduct or end product of naturally occurring processes like leaves, and compost.