The main purpose of a welding electrode is to?

The primary function of a welding electrode is to provide filler metal that helps to join two or more workpieces together during the welding process. As the electrode melts, it deposits the filler metal into the joint, thereby creating a strong bond between the materials being welded. This is essential in most welding techniques, as the filler metal is necessary to ensure the integrity and strength of the welded joint.

In addition to supplying filler material, the electrode may also create a protective gas shield or slag that helps to shield the molten weld pool from oxidation and contamination, but its main purpose remains the introduction of material to strengthen the connection. This is why option A accurately represents the fundamental role of a welding electrode.