Which feature allows IoT devices to collect environmental data?

The correct answer is that sensors allow IoT devices to collect environmental data. Sensors are specialized components designed to detect and measure physical properties from the environment, such as temperature, humidity, light levels, motion, and air quality. Once these readings are captured, the sensors convert the analog signals into digital data that can be processed and analyzed by the IoT device or transmitted to external systems for further use.

This capability is fundamental to the functioning of IoT devices, as they rely on accurate and real-time environmental data to perform tasks, automate processes, or make informed decisions. For instance, a smart thermostat uses temperature sensors to monitor the ambient temperature and adjust heating or cooling accordingly, enhancing energy efficiency.

Other options, while important for the overall functionality of IoT devices, do not directly pertain to the collection of environmental data. Networking facilitates communication between devices, allowing data to be shared and processed. The power supply is essential for the operation of the device. Data logging involves storing the data collected over time but does not by itself enable the collection of that data. Thus, sensors are the critical feature that enables data collection from the environment.