Where as a computer mouse moves over the table surface, the trackball is:

Correct option is A

Unlike a computer mouse that needs to be moved on a surface, a trackball remains stationary. The user rolls the ball embedded in the device with their fingers to move the pointer on the screen, making it ideal for limited desk space.

Important Key Points:

1. A trackball stays fixed in place while the ball is rotated to control the cursor.
2. It provides precise control and is commonly used in industrial or design setups.
3. Trackballs are useful where desk space is limited or a mouse can't be moved freely.

Knowledge Booster:

•       Difficult to move – Incorrect; trackballs are designed for easy fingertip control.

•       Dragged – Refers to an action with a mouse, not the working mechanism of a trackball.

•       Moved in small steps – Misleading; cursor movement depends on how much the ball is rotated, not fixed steps.