How can we reduce friction​

Explanation:

By polishing the surface, as polishing makes the surface smooth and friction can be reduced. Using lubricants such as oil or grease can reduce the friction between the surfaces. When objects are rolled over the surface, the friction between the rolled object and surface can be reduced by using ball bearings.

hope it helps

by using lubrication like oil

it`s commonly used in metal that`s rubbing or rusting

i think its c

independent

i will have to go with 1.

hope this !