Free radicals are highly reactive in the body either by acting to remove an electron from another molecule ( ), or donating by donating their electron (

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but

im doing test rn im going with 2 but ill give answer if itss wrong,   : )