What function allows for the modification of individual elements in a graphic?

The correct choice is the one that refers to "Layers." In graphic design and editing software, layers are fundamental components that enable users to separate different elements of a design. This functionality allows designers to modify individual elements independently without affecting the others.

When utilizing layers, each graphic element can be placed on its own layer, meaning artists can easily edit, hide, or rearrange these components. For example, if you have a background image, text, and graphics on separate layers, you can adjust the position, opacity, or style of one element while leaving the others untouched. This level of control is essential for complex designs and ensures a non-destructive workflow.

In contrast, grouping elements does not allow individual modification of the grouped items as easily; it essentially combines them into a single unit temporarily. Layering, while a related concept, refers more to the stacking of these layers rather than the ability to modify them. Flattening, on the other hand, merges all layers into one, eliminating the ability to edit elements individually, which further emphasizes why "Layers" is the correct choice for this question.