Answer:
Explanation:
The river plain can also known as just plains that are formed with minimum elevation. Rivers plains mainly occurs along the bottoms of valleys, near mountains.In geography, a plain is a flat, sweeping landmass that generally does not change much in elevation. Plains occur as lowlands along valleys or on the doorsteps of mountains, as coastal plains, and as plateaus or uplands. A coastal plain is a piece of land that is lying low and adjacent to the sea coast.
A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases a river flows into the ground and becomes dry at the end of its course without reaching another body of water.
They started to separate into different countries.
Answer:
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what causes it is when the moon passes directly behind the Earth into its umbra. This only occurs when the sun, earth and moon are aligned exactly or closely
