A 5-Newton is applied to a 2-kg object to move it across a horizontal surface at a constant speed for a distance of 4 meters.

i think they are all correct

explanation:

they seem good

i think the answer would be b

in most common fires, oxygen is needed for an oxidation reaction to takes place. the combination of oxygen with any element as fuel can create fire and combustion will occur especially if wood, light materials and other combustible things are combine with oxygen.