Answer:
B. is the force that resists sliding along a surface.
Explanation:
In simple words friction can be considered as an opposing force. When you slide a ball along a surface it will stop after some time because of the friction between the ball and the surface. Apart from a surface even air around us applies frictional force. This is the reason airplanes have pointed nose to reduce the friction, commonly called as drag. Along with land and air water also applies frictional force and slows things down. This is the reason boats' hull are made pointed.
