Which one of the following is not found on Mars? A) extinct volcanoes B) sand dunes C) polar ice caps D) H₂O- rich atmosphere

Question

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Mars has a very thin atmosphere, which is not rich in oxygen. The other options (A, B, and C) are all features found on Mars, with extinct volcanoes, sand dunes, and polar ice caps being some of the most well-known features of the planet.

Which One of the Following Is not Found on Mars