Question

Why Mars is Red...?

Answer 1

It is red due to the rust in the Martian rocks present on the surface of mars which makes its appearance red when seen through sky
Hope it help u

Answer 2

The red colour we see in images of Mars is the result of iron rusting. Rocks and soil on the surface of Mars contained a dust composed mostly of iron and small amounts of other elements such as chlorine and sulhpur. The rocks and soil were eroded by wind and the dust was blown across the surface by ancient volcanoes. Recent evidence points to the very fine dust also being spread across the planet by water, backed up by the presence of channels and ducts across the surface of Mars.