- A. Humanoid based on Artificial Intelligence (AI): Sophia (V) is one of the most well-known examples of a social humanoid robot powered by AI, developed by Hanson Robotics. - B. Natural language processing (NLP): Text-to-Speech (III) is a direct application of NLP, where written text is converted into spoken language using AI techniques to understand and process the text. - C. Unmanned aircraft: A Drone (II) is the most common term for an unmanned aerial vehicle (UAV), which is a type of unmanned aircraft. - D. Operating household devices using smartphone: This functionality is a core aspect of the Internet of Things (IoT) (IV), where everyday devices are interconnected and can be controlled remotely, often via smartphone apps.