There are three types of balance which are symmetrical balance, asymmetrical balance, and approximate balance. Symmetrical balance is where the artwork is evenly placed with its balance. Asymmetrical balance is where it’s not evenly placed with balance. Approximate balance is where the piece of artwork has balance using the other elements of art like colors, lines, shapes and more, but doesn’t have any identical areas or objects within the artwork
Answer:
I do believe that the hardest part of an art critique is all based on opinion. Some have trouble with finding flaws, some with finding the good things. It all depends on you.
You can find it in art history books, Wikipedia