Which of the following is capable of charging an insulator?

Insulators are formed of materials that do not conduct electricity or heat (or are made of a substance that is a poor conductor of both heat and electricity). Even if an excess charge is applied to an insulating material, it will not move and will remain in place eternally.

Insulators include materials such as amber, fur, glass, plastic, and wool, which are known to be affected by static electricity.

When two items rub against one other to create static electricity, a potential difference is created because one object gives up an electron and becomes more positive, while the other becomes more negative, resulting in a disproportion between positive and negative charges in the object.

These charges can build up on an object's surface until they find a means to be discharged or released.

Making them come into contact with each other is one technique to discharge them.

As a result, when an insulator is touched, static electricity is created, which charges the insulator.