Final answer:
After the royal court in Heian became more focused on art and culture, the central authority weakened, leading to power struggles among regional clans. This period also saw increased decentralization of political power to provincial governors and a rise in social stability.
Step-by-step explanation:
After the royal court in Heian became more focused on art and culture instead of running the government of Japan, the central authority weakened, leading to power struggles among regional clans. The rise of provincial warrior families and the emergence of the samurai class were outcomes of the central imperial authority coopting them to perform essential military service. The Heian period also saw increased decentralization of political power to provincial governors and a decrease in internal conflicts, which led to a rise in social stability.