A dune<span> is a mound of </span>sand<span> formed by the wind, usually along the beach or in a desert. </span>Dunes form<span> when wind blows </span>sand<span> into a sheltered area behind an obstacle. </span>Dunes<span> grow as grains of </span>sand accumulate. Sand dunes<span> serve an important purpose by protecting inland areas from coastal water intrusion. They are able to absorb the impact and protect inland areas from high energy storms and act as a resilient barrier to the destructive forces of wind and waves.</span>
It is called erosion hope it helps
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I hope that we are free from these disaster(codiv19) and I really hope that chemistry, biology, physics and addmath disappear from this world coz it's really difficult and make me struggling every time till I'm brainless
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In fact, you may point your flashlight (or laser pointer, if you prefer) at the Andromeda galaxy. There is a non-zero probability that one or more of the photons will be seen by some alien in that galaxy when they happen to glance into the sky at the Milky Way. However, you must take care to aim your flashlight not where Andromeda appears now, but where it will be in 3 million years. Good luck!
It is knowing as stellar evolution
