In Italy's city - states, knowledge of arts such as painting, sculpture, and architecture grew because

Answer: Due to the development of capitalism in Florence and the trade routes controlled by Venice.

Explanation:

In such circumstances, Italy was the most important European country for the development of the arts, sciences, and all social spheres. A banking system developed in Florence, they passed money to European rulers, from whom they took an interest. The development of a capitalist society in this part of Italy was well suited to this phenomenon. Venice, on the other hand, was one of the most powerful naval forces in the Middle Ages. In contact with many different cultures, with all the wealth they possessed, the development of art, culture, and science came about. For all that, Italy was an ideal place for the development of Renaissance thought.