Final answer:
Increased economic prosperity, material availability, cultural exchanges, and the monarchy's accessibility contributed to the flourishing of art and architecture during the Middle Kingdom of Egypt.
Step-by-step explanation:
During the Middle Kingdom of Egypt, a stable and prosperous society led to an increase in art and architecture. The reunification of Egypt under a more accessible monarchy increased interactions, enriching cultural and economic exchanges through extensive trade routes.
Developments in language and new materials, such as white marble and the color purple, along with innovative methods from various cultures, greatly contributed to flourishing arts and increased monumental architecture as a display of power and wealth.