Question

how to action and reaction forces help us to walk

Answer 1

yes because we apply force backwards and we go forward the force we apply that is sufficient to goes in forward direction . it's newton's 3rd law of motion

Answer 2

hey
while we walk we push the ground backwards 
due to Newton's 3rd law it pushes us in opposite direction ie forward with an equal force
so we are able to walk

hope it helps
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