Charge transfer occurs due to the movement of A/ (positiveegative) charges. A/ (positiveegative) charges, also known as (protons/electrons), are always stationary. Materials that allow the free movement of electrons across their surface are A (insulators/conductors). On the other hand, materials that do not allow such free charge movement are known as A (insulators/conductors). Thus, when such materials are charged, electrons remain fixed at the initial location of charging