Question

if a man is walking the direction of friction is

Answer 1

So in this case your foot exerts a frictionforce in one direction on the ground and the ground exerts a force of equal magnitude on your foot but in the opposite direction. Your foot exerts a friction force backwards from the point of view of your motion whilst the ground exerts a friction force forwards on your foot.

Answer 2

if you are walking your foot exerts friction in the opposite direction of which u r walking