What is the difference between bones and composition in planar composition?

When painting, according to the requirements of the subject matter and theme ideas, the images to be expressed are appropriately organized to form a coordinated and complete picture, which is called composition.

Photography composition is transformed from the composition of art. We can also simply call it framing.

Skeleton, the frame and skeleton of graphics in plane composition. It is a tangible or invisible grid, line, or frame drawn to arrange graphic elements in an orderly manner.

In photography, the concept of bones is generally not discussed.

It can be considered that skeleton is a noun; composition is not only a noun, but also a verb.