Answer:
His fundamental ideas concern drawing contours, structuring a composition, and using colour.
Explanation:
Many modern will often use pen and ink as their main medium. In history most used paint, like for the stunning Mona Lisa. However, in a long time ago, most artists did not use ink. Maybe because they thought ink would look sketchy. Back then, most people did not like sketchy art, be in the modern world, now we do.
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