What is a true effect of energy efficiency on energy demand?

• A. It lowers energy required for the same service
• B. It increases energy demand by enabling more consumption
• C. It only affects electricity, not heating
• D. It eliminates the need for renewable energy

Answer: (A)

The main idea being tested is that energy efficiency reduces how much energy is needed to deliver the same service. When a building is better insulated or an appliance is more efficient, it achieves the same warmth, light, or performance using less energy. That’s why the best answer is that energy efficiency lowers energy required for the same service.

Illustrating with examples helps: insulation cuts heat loss, so heating needs less energy; efficient appliances use less power for the same task. This fundamental effect holds even though, in some cases, people may respond to lower operating costs by using more energy services (the rebound effect), which can offset some savings in total energy. The other statements aren’t correct because energy efficiency applies to heating as well as electricity and does not magically remove the need for renewable energy.