Cosimo de' Medici was a ___ of Renaissance artists.

Patron

Explanation:

Cosimo de Medici was a banker and politician who established the Medici family as rulers of Florence during the Renaissance. Medici families were merchants and bankers, spend much of their wealth in creating Florence as a centre of art and culture. The Platonic academy became an informal group of scholars patronized by Cosimo de Medici. The Medici family became patron of Filippo Brunelleschi and many other artists.

in the 1950s, country music came into its own before rock-n-roll took off in the 60s while jazz and classical music continued to innovate

that would be the steamboat because none of the other things are forms of transportation