If art lacks a clear definition, what criteria are used to determine what a work of art is? Please look at several works

[answerhappygod]

If art lacks a clear definition, what criteria are used to
determine what a work of art is? Please look at several works on
any museum website to discuss what constitutes "art." Some major
museums include the Metropolitan Museum of Art, Art Institute of
Chicago, or National Gallery of Art, or consider finding a local
museum. The permanent collection is normally under the Collections
link, but feel free to explore the entire website for your
selection.
What approaches should we take in responding to a work of
art?
Select an example of art that fits your definition of art and
provide an example of non-art (either from the site or in the world
around you).
Determine how line, color, texture, and/or composition are part
of your definition.