Compare and contrast earth and mars ?

well lets see

Explanation:

:Earth: has magnetic field and atmosphere life water soil rock land masses oceans marine life and human life it also has diesease and bacteria and death and basic life cycles earth was the cradle for life itself earth also has a moon oxygen and many other gasses such as co2 it go endless of how much i could name that earth has.

:Mars: mars has no liquid water it can be teraformed it has rock and no magnetic field and atmosphere the gravity is either 25-30% on mars making it or us would weigh less on it it has no life at all it has no oxygen its just malny co2 which  is leathal to us the water is forzen in the iceaps  

what they have in common: they both have water in either way they both can sustain life aslong as you teraform mars they both have land masses mars will soon have a colenie on it it 2024 so it will have people on it mars can support plant life as soon as they teraform some major areas AND  endless

c is the answer because when something is left after something evaporates that shows the chemical change.

since electrons are negative the answer is neagtaive