Which of the following would you not find in a program symphony? only one movement extra sounds to enhance the mood (like cannons) a very descriptive title instruments imitating nature sounds

Only one movement. Are you kidding, it's a symphony for a reason, lol. It could very well be nature sounds as well, but the trumpet has been known to imitate the whinny of a horse. Hope this helps!

The gregorian chant was a major cultural milestone in the middle ages. it was one of the first codified forms of music meant to be played as written, where previously it was difficult to mass-produce and disseminate any music. what's more, these chants were also some of the first examples of musical notation: the notes and bars of today's music sheets are a reflection of centuries of evolution beginning with these chants. it became official throughout the entirety of the catholic church, meaning that nearly all of europe followed this musical notation and styling.