The technology used to track movements and provide interaction in VR (virtual reality) environments is motion tracking. Motion tracking systems use various sensors, such as cameras and accelerometers, to detect and monitor a user's physical movements. This data is then translated into the virtual environment, providing an immersive experience. Technologies like marker-based and markerless tracking are utilized to enhance interactivity and realism. The ability to track and represent the user's actions accurately is crucial for effective VR applications.