Each statement below represents a feature that has been claimed to exist on Mars. Sort the statements according to whether each is a feature that actually exists, that does not actually exist, or that might exist but about which we cannot yet draw a definitive conclusion. Real Mars/Imaginary Mars/Unknown Mars1. Minerals of types known to form in liquid water2. surface pools of liquid warer3. microscopic life4. abundant water ice5. dried-up river beds6. a network of straight-line canals7. cities built by an ancient civilization8. underground pockets of liquid9. frequent rainfall and snowfall

not actually exist:

7. cities built by an ancient civilization2. surface pools of liquid water6. a network of straight-line canals3. microscopic life

might exist:

5. dried-up riverbeds9. frequent rainfall and snowfall8. underground pockets of liquid4. abundant water ice1. Minerals of types known to form in liquid water

Explanation:

The mars is the fourth planet in the solar system and are has minerals and the other elements that help the formation of the water and ice sheet.  It also has the presence of an abundance of them that can be seen over the polar zones of the plant that indicates the dried river beds. The underground pockets of the liquid which shows the possibility of the frequent rainfall and snow in the past endowment of the planet.

C. naturally in the environment

A,b,c is the answer to the question