Which of the following mobile phone features redirects the screen orientation as the user turns their phone?

GPS uses satellite signals to determine geographic location and has no function in detecting device rotation or managing screen orientation.

Geotracking is a software-level feature that records or reports a device's geographic position over time and does not interact with screen rotation.

A locator application is a software tool that uses GPS or network data to determine location; it is not a hardware sensor and does not control screen orientation.

A gyroscope is a sensor that measures angular velocity and rotational change along multiple axes. When the device is rotated, the gyroscope detects the change in orientation and passes that data to the OS, which then redraws the display in portrait or landscape mode accordingly. This is distinct from the accelerometer, which measures linear forces, making the gyroscope the precise sensor responsible for tracking physical rotation.