What is the role of a Canvas Group in Unity UI?

• A. CanvasGroup allows you to disable interaction and control visibility of UI elements within a canvas.
• B. CanvasGroup controls lighting on UI elements.
• C. CanvasGroup stores textures.
• D. CanvasGroup automatically updates to every frame.

Answer: (B)

CanvasGroup is used to treat a set of UI elements inside a canvas as a single unit for visibility and input control. By adjusting its properties, you can fade the entire group with alpha, disable user interaction for all elements in the group, and decide whether the group should block raycasts (preventing or allowing clicks). This makes it easy to show/hide panels and enable or disable their controls without touching each child individually.

It doesn’t manage lighting, store textures, or automatically update every frame. Lighting and textures are handled by rendering/shader settings and the individual UI elements, while per-frame updates are not a responsibility of a CanvasGroup.