The correct option is B Pinches
Proverbs are sayings that express a truth about a common experience.
'Only the wearer knows where the shoe pinches' is an idiomatic expression, or a proverb that means: 'Only the person who faces a trouble or difficulty, will know its cause.'
The word 'pinches' does not give a literal meaning 'of pinching' to this sentence.
The expression hence formed is idiomatic.
So, option B is correct.
The words 'bites', 'strikes', 'punches' are literal in meaning, as they do not form idiomatic expressions in this sentence. Shoes cannot literally bite, strike or punch.
Hence options A, C and D are incorrect.