Why is it important for earth to have both gravity and inertia?

It is important for Earth to have both gravity and inertia because if there was'nt these things everything would flow in the air and most things would'nt be on ground like in outer space and we need these things to survive like to plant plants, trees and other things.

the answer is c most of the fortnite players usually buy v bucks to get the battle pass and other cosmetics but some players who are referred to as "no skins" don't   buy skins and are usually noobs.

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the question isn't complete here so i can't right an answer '_'