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In looking for other planets that might have life, astronomers focus especially on finding planets that _____.


are the same size as Earth

have rocky surfaces

have liquid water

have nitrogen-filled atmospheres

Verified Answer :

BluTurtle

the answer is C, they have liquid water

Answer: have liquid water

Explanation:

Liquid water and atmosphere are important for life to exist on a planet. Life can exist in the form of unicellular. It must not be multi-cellular organisms like animals.  A cell is majorly composed of water. Thus, liquid water is very essential for life to exist. All the life processes require liquid water. Thus, astronomers focus especially on finding planets that have liquid water.

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