Mark the option/button in the following image of the Animations tab to add sound effects to an animated object.

Answer:

Explanation:
In Microsoft PowerPoint 2010, the Custom Animation task pane has been renamed the Animation
Pane. While using the Animation Pane, a user cannot add animations to objects. It is situated at the
right side of the program. Take the following steps to apply sound effects to animated texts and objects:
1.Click on the Animations tab. In the Advanced Animation group, click the Animation Pane button.