Brainiest! what might happen to the sand in the valley if more sand is deposited on top of it? make it 2-3 sentences, this is very appreciated! i will give the brainiest and quite a few points if you answer it like i asked.

: 3

When sand is already present in a valley and more sand is deposited on top, it becomes a sand dune. As more sand is deposited, the dune gets bigger. Slowly but surely, the sand fills up the valley, until the valley is non-existent, but level to the ground.

where is the scientific experiment?