Question

Why do like charges repel and unlike charges attract?

Answer 1

Because they r opposite so they attract each other and
Electric field lines emerges from positive charge and enters negative charge due to which it experiences a force , force which attracts it towards itself

Answer 2

Two electrons will tend to repel each other because both have a negative electrical charge. Two protons will also tend to repel each other because they both have a same charge. On the other hand, electrons and protons will be attracted to each other because of their unlike charges.