Answer:
Mosaic
Explanation: The use of tiles as a medium would point to the artwork being called a mosaic. Tessera is another name for the tiles used in a mosaic.
Answer:
The answer is the first one, the use of 1 color in a variety of tints and shades. Keep in mind that mono means 1. This will help you in the future.
Explanation:
C - Guillaume De Machaut
It was composed before 1365 by this French composer.
Hope this helps!