Which of the following is an example of an Internet of Things (IoT) device?

An Internet of Things (IoT) device refers to any physical device that connects to the internet and is capable of collecting and exchanging data. These devices often enhance communication, automation, and monitoring in various environments.

Alexa, developed by Amazon, is an example of an IoT device as it is a virtual assistant that operates on internet connectivity to control smart home devices, answer questions, play music, and provide weather updates. It exemplifies IoT as it connects to various smart home technologies, allowing users to command and control them via voice recognition.

In contrast, Microsoft Word and Adobe Photoshop are software applications focused on productivity and creative tasks, and they do not inherently connect to the internet as devices do. Similarly, Windows 10 is an operating system that runs on computers and also does not represent an IoT device by itself; it serves as a platform for software applications rather than a device that communicates and interacts within the IoT ecosystem. Thus, the only option that fits the definition of an IoT device is Alexa.