Which statement best aligns with how IoT can help reduce energy use?

• A. Increased data center cooling.
• B. Solar panel installation.
• C. Widespread free Wi-Fi access.
• D. Smart devices working to reduce energy use.

Answer: (D)

IoT reduces energy use by turning sensing and automation into actions that cut waste. When devices are connected, they can monitor conditions like room occupancy, temperature, and lighting, then automatically adjust settings to use less energy without sacrificing comfort. Smart thermostats learn schedules and preferences and can cool or heat only when needed; smart plugs and lighting systems turn off or dim things that aren’t in use; occupancy sensors trigger lights and climate controls only where and when people are present. This is exactly what the statement about smart devices doing their part to lower energy use describes.

The other options don’t capture this IoT-driven efficiency: simply increasing data center cooling might raise energy use; solar panels generate energy rather than reduce consumption via connected devices; free Wi-Fi access is unrelated to energy savings. The IoT-enabled approach—smart devices autonomously optimizing energy use—best aligns with reducing energy consumption.