Final answer:
Athens enforced its dominance over the Delian League by compelling member city-states to pay tribute, support a large navy, and adhere to Athenian political control, ultimately transforming the alliance into an Athenian empire.
Step-by-step explanation:
Athens compelled other city-states in the Delian League to pay tribute and support a large navy, originally to protect Greece from Persian interference. However, as Athens grew more powerful, it began exerting political control over member states. Athenians stationed troops in these cities, enforced new laws, regulations, and taxes to ensure a steady flow of money to Athens, and crushed any revolts against their control. Athens' dominance was further secured when it moved the League's treasury from Delos to Athens, symbolizing the transformation of the League into an Athenian empire.
The political leader Pericles expanded Athenian democracy by instituting the policy of paying public servants and jurors. This, along with the restructuring of citizenship laws, led to growth and prosperity for Athens, but it came at the expense of other Greek cities which made up the essentially Athenian-controlled Delian League.