What is the “framing” guideline for photography? What are some ways of framing within a photograph?

Framing refers to using elements of a scene to create a frame within your frame. For example, you might shoot through a doorway, pulled back curtains, branches, fences, tunnels, or arches to highlight your subject. Adding a focal point through framing shows a viewer exactly where to look.

Explanation:

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i believe their role is to instruct certain sections on when they are to join and when they are to stop