conservation for art is "preserving, fixing, or just restoring old art or other things like artifacts etc." (found in an article on www.msaconservation.com) it's most likely controversial because if something's old and valuable, people want to keep it in it's original form. (just a guess) but that's how it is in the art world.
Answer:
Picasso and Georges Braque developed this technique and used it to simplify and distill any three-dimensional subject into a multi-faceted, “cubist” shape. Picasso was also greatly influenced by the carved, angular shapes of African masks, an inspiration that can be seen in many of his paintings.
Explanation:
