What are the three ways by which static charge is produced?

Static charge is produced through friction, conduction, and induction. Friction occurs when two materials rub against each other, transferring electrons and creating a charge. Conduction happens when a charged object comes into direct contact with a neutral object, transferring charge between them. Induction involves a charged object creating a charge in a neutral object without direct contact, by causing the electrons to rearrange within the neutral object.