How does a meander form in a river?

A meander forms in a river by eroding laterally, to the right side then the left side and the left side again, this forms large bends, which then horseshoe like loops called meanders. The force of the water then erodes and undercuts the river bank on the outside of the bend which is where the water flows and it has the most energy due to the decreasing friction.

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answer; /// during daylight hours the sun heats up the ground,and at night the clouds insulate the warmth making it warmer ;