Plzz answer and thanks

Erosion

Step-by-step explanation:

Erosion is the movement of sediment from one place to another. Erosion is the mechanical process of wearing or grinding somethin down. It condition in which the earth’s surface is worn away by the action of water and wind.

Therefore, the answer is erosion.

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point a is the center of the circle that passes through points e, f, and g and the center of the circle that passes through points x, y, and z.