Why can having an understanding of imagery, proportion, balance, and design help you to evaluate the validity of an artwork

When taking in consideration all of the above, validating an artwork becomes increasingly simple. If you can look at a painting and understand how the artist used depth to create the image, you can validate that painting, or can look at a still-life sketch and tell if it looks bad or not because you understand proportions.

Explanation:

wait i don't understand this, but my guess is that this is a trick question.

why are there few examples of totem poles from before 1900

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