Computer mice are generally classified as three types based on the technology that is used to detect cursor movement and to track the position of the cursor on the computer screen (optical, mechanical, and optical-mechanical).
Mechanical mice utilise a ball to measure the movements of the mouse. Optical mice have an illuminated optical sensor (light) to detect the mouse's motion. Optical-mechanical mice are hybrid devices, using both optical and mechanical technologies for precise cursor tracking.
On the other hand, motorised is not a valid mouse technology and has no bearing on how the mouse detects movement, so it is the best answer.