What principle will an artist use to control where you look first, second and third?

Movement - this principle shows actions or alternatively the path the viewers eye follows throughout an artwork

Unity - the concept behind an artwork.

Proportion - measurement of the size and quantity of elements within a composition

Photography has changed its subject matter quite a lot over the past few years. in the 1800's, it was considered normal for families to have  post mortem photos of their loved ones, and now that would be completely unacceptable. i think that photographers have always pushed boundaries and have been eager to capture everything, it is just society that changes their boundaries.

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