How are sand dunes and deltas. different?

Sand dunes and deltas are different in their formation and environment. Sand dunes are primarily formed by the accumulation of sand through wind action in arid or coastal regions, creating mounds or ridges. In contrast, deltas are formed at the mouth of rivers where sediment is deposited as the river flows into a larger body of water, typically creating a fan-shaped landform. While both are shaped by sediment movement, their locations and the processes that create them are distinct.