Close-up images of Mars by the Mariner 9 probe indicated networks of valleys that looked like the stream beds on Earth. These images also implied that Mars once had an atmosphere that was thick enough to trap the sun’s heat. If this were true, something happened to Mars billions of years ago that stripped away the planet’s atmosphere This paragraph best supports the statement that

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Andy

Andy

What is the correct solution?

Priya

Priya

does anyone know the correct answer

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