Which countries are considered Micro-states?

Micro-states are defined as very small countries that often have limited land area and population. The correct choice includes specific examples of recognized micro-states: Andorra, Gibraltar, Liechtenstein, Monaco, San Marino, and Vatican City. Each of these entities features a small geographic size and population compared to larger nations, often resulting in unique economic and political structures.

The other options do not accurately reflect the definition of micro-states. Countries with populations over 1 million encompass a broad category that does not relate to the concept of micro-states. Large nations found on continents also do not fit the definition; their size and population metrics are contrary to the defining characteristics of micro-states. Lastly, nations that are primarily agricultural are defined by their economic activities rather than their geographical size or population, which is irrelevant to the classification of micro-states.