Which of the following IoT devices can measure temperature, sound, and light?

The correct response highlights sensors as IoT devices capable of measuring temperature, sound, and light. Sensors are essential components of the Internet of Things because they collect data from the environment and convert it into digital signals that can be analyzed, transmitted, or acted upon. This includes various types of sensors: temperature sensors for monitoring environmental conditions, sound sensors for detecting noise levels, and light sensors for measuring illumination.

Sensors play a critical role in smart systems, allowing them to respond to changes in their surroundings automatically. Their ability to monitor multiple environmental parameters makes them highly versatile and valuable in numerous applications, from smart home systems to industrial automation.

Smart devices and wearables are broader categories that often include sensors but are not specifically defined by their ability to measure these parameters directly. Hubs, on the other hand, primarily serve to connect different devices and facilitate communication between them, rather than measure any environmental quantities.