Why is the pointed arch seen i gothic architecture structurally more stable than the rounded arch used earlier

The author of the article, leanne cole, shares two photos that she took. she concludes that only the first one, the home built in the 30's, could be considered 'fine art'. why do you think that is?

Organum was first developed by religious singers adding another melody directly above the chant and mirroring the chant line. true false

Explain briefly why it's to choose a chord progression before developing the harmony.