Wind erosion and deposition may form? a) valleys and alluvial fans
b)beaches and spits
c) sand dunes and loess deposits
d) valley glaciers

C. sand dunes and loess deposits

Explanation:

Wind erosion is when wind forcefully moves sand particles from one place to another. This can end up forming sand dunes which comes in different shapes.

Also, loess are gotten from silt and clay that are blower by wind and deposited on a large area lawyer of land. Therefore, wind erosion and deposition may form dunes and loess deposits.

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.