State three differences between solid friction and viscosity​

Difference between solid friction and viscosity is as follows: Viscosity is proportional to the surface area whereas solid friction is independent of area of solid surfaces in contact. Viscous force on the body depends upon its velocity in the viscous media. But, friction does not depend on the velocity of the body.

If football was tossed in air without gravity or friction the ball would go into space

The answer should be a.