Which term in PIES refers to the component that provides energy?

• A. Switch
• B. Power Source
• C. Initiator
• D. Explosive

Answer: (B)

In this PIES framework, the energy originates from the component that supplies power. The Power Source is where energy is provided or stored for the circuit and is the starting point for any operation. The switch acts as a gate to control when energy can flow, but it doesn’t supply energy itself. The initiator receives the energy and uses it to trigger the next step, while the explosive is the material that responds to that trigger. So the term that provides energy is the Power Source.