What colors did early humans use in their art

According to the article in wiki answer, digital communication systems have more benefits than analog systems. they are faster and more flexible, and they offer better performance than analog communication

Most of the written music that has been preserved from the middle ages is a. sacred. b. for flute and guitar. c. polyphonic. d. dance music.

This brooch contains a miniature picture of american statesman henry clay. likely owned by clay or his ancestors, this brooch is valued for what reason? a. scholastic value b. provenance c. cultural heritage d. market value pls hurry and you