The theory that taught only the strong survived
The correct answer is "Wealthy residents bought works of art, which supported artists". Renaissance was pivotal era for art in Italy, as very talented artists flourished in this era, artists that included Leonardo Da Vinci, Michelangelo, Sandro Botticelli, Raphael, among others. Wealthy residents contributed to art by buying the works of relevant artists, which was a motivation for artists to keep performing their work.
Answer:
to make an exchange of goods and services
I am not so sure what you mean by "what kinds of unions were formed", but if you're talking about the Civil War then I think the unions were Confederate and Union. The Confederates wanted to run the country with slavery while the Union fought against slavery. Do not quote me on that though.
