Final answer:
There was no single kingdom that emerged supreme within the Holy Roman Empire due to its weak and decentralized political structure.
Step-by-step explanation:
The Holy Roman Empire, a weak and decentralized political entity, consisted of four principalities and the archbishops of three cities within the empire. There were over one hundred principalities within the empire, each with varying degrees of power and autonomy.
It was an elected emperor who ruled over the empire, and the power dynamics among the rulers and the pope influenced the supremacy of the kingdoms within the Holy Roman Empire. Therefore, there was no single kingdom that emerged supreme within the empire.