After choosing a predefine template                  option has to be chosen to change a background color in Ms PowerPoint?

The correct answer is Color Scheme because a presentation theme or predefined template relies on a set palette of colors that governs text, backgrounds, and accents globally.

• Step 1 (Software Logic): In classic versions of Microsoft PowerPoint, applying a Design Template configures default layouts. To alter the underlying slide background tones or matching text fills without wiping out the structural layout, you modify the built-in Color Scheme variants.


• Step 2 (Application): Adjusting this setting swaps out the active palette, ensuring all template elements remain highly readable and visually coordinated automatically.


• Incorrect Options:
  
  
  
  • Design Template is incorrect because selecting this menu category changes the entire layout arrangement, graphic accents, and font styling rather than simply fine-tuning the background color.
  
  
  • Animation Scheme is incorrect because it dictates motion effects, visual transitions, and entrance behaviors for text boxes and graphic shapes.
  
  
  • Color Effects is incorrect because it refers to filter presets or gradient fills applied onto individual shapes and pictures rather than the macro presentation template rules.