What technology immerses users in a simulated 3D environment for purposes such as training and entertainment?

The correct answer is Virtual Reality. This technology creates a fully immersive 3D environment that users can experience as if they are physically present within that space. Virtual Reality typically involves the use of headsets that track the user's movements, allowing them to interact with the simulated environment in real time. This immersion can enhance learning and engagement, making it an effective tool for training in various fields, such as medicine, aviation, and even entertainment, like gaming and simulations.

While Augmented Reality overlays digital information onto the real world, it does not provide the same level of immersion as Virtual Reality. Cloud Computing refers to the delivery of computing services over the internet, while Cyber-Physical Systems integrate physical processes with computation but do not specifically focus on creating immersive environments.