Question

In which direction does the friction acts on a body? “Friction is a necessary evil.”Elaborate.

Answer 1

opposite to anybody on which friction is acting

Answer 2

The direction of friction is always opposite to the motion of the object.
Friction is a necessary evil as
It is necessary as it lets us write, walk, hold things etc.
It is an evil as it wears out the soles of our shoes, tyres