Question

holds the electrode and conducts electricity to create an arc
supplies the power needed to generate the welding arc
completes the electrical circuit by connecting to the workpiece
a. electrode holder
b. grounding clamp
c. welding machine

Explanation:

1. For the description "holds the electrode and conducts electricity to create an arc", the electrode holder is the device that holds the electrode and conducts electricity for arc creation, so it matches option a.
2. For "supplies the power needed to generate the welding arc", the welding machine is responsible for supplying the power for the welding arc, so it matches option c.
3. For "completes the electrical circuit by connecting to the workpiece", the grounding clamp connects to the workpiece to complete the electrical circuit, so it matches option b.

Answer:

1. "holds the electrode and conducts electricity to create an arc" - a. electrode holder
2. "supplies the power needed to generate the welding arc" - c. welding machine
3. "completes the electrical circuit by connecting to the workpiece" - b. grounding clamp