A scientific theory is something believed to be true, thus already tested. When you make an observation you infer, and test your observations to see if they’re true. Please mark me brainliest if I helped :)
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Mawsynram, Meghalaya, India has the most rainfall.
The rainfall is 11,873 mm (467in) per year.
A common crescent-shaped dune with horns pointed downwind is called a barchan dune.
A barchan or barkhan dune is a crescent-shaped dune. Barchan ("BAR-kahn") dunes form in areas with only one wind direction, and little or no vegetation. If conditions were "perfect"—the landscape was flat, winds blew from only one direction, vegetation could not grow, and sand was available but limited —barchan dunes would dominate a sandscape. One of the commonest types of dunes, it occurs in sandy deserts all over the world. Barchans are mostly formed by the wind from one direction and appear convex. They are arc-shaped, significantly asymmetrical in cross-section, with a gradual slope towards the wind sand ridge, and made out of well-sorted sand.
To learn more about barchan dune here
brainly.com/question/2515927
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