Final answer:
Uruk was considered the first metropolis, and it was associated with the legendary King Gilgamesh. The ancient city played a central role in the Sumer civilization.
Step-by-step explanation:
Archaeologists agree that Uruk was probably the first metropolis, and it was the largest city of Sumer during the Uruk Period. It was home to the legendary king Gilgamesh; another well-known city of Sumeria was the biblical Ur. Among the options provided (a) Megalopolis, (b) Metropolis, (c) Microcosm, (d) Municipality, the correct answer is b) Metropolis. The term metropolis suits Uruk due to its significant size, central importance in the region, and advanced urban organization during ancient times, reflecting its role as a major hub of trade, administration, and culture.