Final Answer:
The Vardar River rises in Macedonia, passes through Skopje, and travels through Greece, ultimately emptying into the Aegean Sea.
Step-by-step explanation:
The Vardar River, originating in the Republic of North Macedonia, flows southward through the capital city, Skopje. As it continues its course, the Vardar crosses into Greece, where it is known as the Axios River. The river then flows through northern Greece before reaching its destination, the Aegean Sea. The Vardar/Axios River is significant for the regions it traverses, providing water resources and shaping the landscapes through which it passes.
In summary, the river that rises in Macedonia, passes through Skopje, and flows through Greece into the Aegean Sea is the Vardar River (Axios River in Greece).