Final answer:
Monarchs belong to the ruling class at the top of the social hierarchy in a monarchy. A meritocracy allows for the most social mobility, whereas a republic is governed without a hereditary ruling class.
Step-by-step explanation:
The group of monarchs resides in the ruling class, which is the highest position in a social hierarchy.
Monarchs are typically part of a monarchy, a form of government where a single person (a monarch) rules until he or she dies or abdicates the throne.
This system historically restricts social mobility, as people are born into positions of nobility and wealth is passed through hereditary succession.
The most social mobility is allowed in a meritocracy, where individuals have the opportunity to advance based on their abilities and achievements rather than their social status or birthright.
On the other hand, aristocracies, caste systems, and class systems often limit mobility because social standing is largely predetermined.
In a republic, there is no hereditary ruling class and governance is carried out through representatives chosen by the people, which contrasts with a monarchy where a monarch and their appointed officials wield the power.