Final answer:
Yes, moving sand and sand dunes can affect flooding. Sand dunes can act as natural barriers, preventing water from flowing freely and causing it to accumulate in certain areas, increasing the risk of flooding.
Step-by-step explanation:
Yes, moving sand and sand dunes can affect flooding. When water or wind moves across sediment, it can shape the grains into dunes and ripples. These dunes and ripples can affect the flow of water and potentially contribute to flooding. For example, sand dunes can act as natural barriers, preventing water from flowing freely and causing it to accumulate in certain areas, increasing the risk of flooding.