How does a trackball differ from a traditional mouse?

A trackball differs from a traditional mouse primarily in its design and the way it is operated. While a traditional mouse typically requires movement across a flat surface to control the cursor, a trackball is a stationary device that consists of a large ball mounted on top. Users can manipulate the ball directly with their fingers or palm to navigate the pointer on the screen. This design allows for greater precision and control without the need to move the entire device, making it especially useful in limited spaces or for tasks that require intricate movements.

The other options do not accurately represent the fundamental difference. For instance, the trackball is not designed solely for typing—which is a function of keyboards. Additionally, it can certainly be used for graphic manipulation, often proving beneficial in tasks that demand careful cursor control. Lastly, while a traditional mouse operates on a flat surface, the trackball's design does not involve sliding it on a surface but rather rolling the ball to achieve movement.