Which of the following is a way to help save energy?

Using fuel-efficient cars contributes to energy savings by maximizing the distance traveled per unit of fuel consumed. These vehicles are designed with advanced technology, including better aerodynamics and lighter materials, which enhance their efficiency and reduce fuel consumption. This not only saves energy but also lowers greenhouse gas emissions, helping to combat climate change.

In contrast, leaving appliances on standby consumes unnecessary energy, while using incandescent light bulbs is less energy-efficient compared to newer options like LED bulbs. Additionally, packing refrigerators too tightly can obstruct airflow and force the appliance to use more energy to maintain its temperature. Thus, opting for fuel-efficient cars stands out as a proactive measure to reduce overall energy consumption.