25. What action happens and corresponds to the mouse wheel?a. Zoom in & outb. Zoom left & rightc. Panningd. Zoom out only

Analyzing the Question

To determine the correct action that corresponds to the mouse wheel, we must consider the typical functionalities associated with mouse wheel movements in graphical applications.

Relevant Concepts

1. Mouse Wheel Functionality: The mouse wheel is commonly used for zooming in and out of a view or canvas in many applications.
2. Common Actions:
   • Zoom in & out: Generally achieved by scrolling the mouse wheel up to zoom in and scrolling down to zoom out.
   • Zoom left & right: This is generally not a function of the mouse wheel.
   • Panning: Panning is typically done by clicking and holding the mouse button while moving the mouse, not by using the wheel.
   • Zoom out only: This is not correct as the wheel can also zoom in.

Conclusion

Given these considerations, the action that happens and corresponds to the mouse wheel is primarily to allow users to zoom in and out.

Final Answer

a. Zoom in & out