Who was the greek philosopher that explained how each mode could be used for different reasons

To make an etching the artist first coats the entire printing plate with an acid-resistant substance called a made from beeswax, asphalt, and other material. the artist then draws on the coated plate with an etching needle exposing the metal. next the plate is dipped in the plate is removed, the waxy coating removed, and the plate is cleaned, inked and printed.

Opera combines music with which of the following

3christians adapted the roman basilica and used it for public worship. where in their churches did they place the altar?