The correct answer is: Object Color.
A design template is a pre-made set of colors, fonts, and other design elements that you can use to create a presentation. A color scheme is a set of colors that are used throughout a presentation. Font color is the color of the text in a presentation. Object color is the color of an object in a presentation.
If you need to change the color of different objects without changing content, you can use the Object Color command. This command allows you to change the color of any object in a presentation, including text boxes, shapes, and pictures. To use the Object Color command, select the object that you want to change the color of, and then click the Object Color button on the Drawing Tools Format tab. In the Object Color dialog box, select the color that you want to use, and then click OK.
The other options are not correct because they do not allow you to change the color of individual objects without changing content. A design template changes the color of all objects in a presentation, a color scheme changes the color of all text in a presentation, and font color changes the color of all text in a presentation.