Balance

This picture particularly gives off a formal form of balance because the windmills are spinning and moving along with each other.

This photo is a form of informal balance because the pawns may have quantity over the queen but the queen means more than any of the pawns.

This photo gives off a form of formal balance because the water and the droplets seem peaceful and symmetrical to whats going on.

This photo doesn't have any balance to do with the photo in itself. 

This photo shows a form of informal balance because the egg itself is balanced upon a platform but there is a different variety of colors that envelops it.