Final answer:
The Tigris and Euphrates rivers flow through the Fertile Crescent and present-day Iraq.
Step-by-step explanation:
The two important rivers that flow through the Fertile Crescent and present-day Iraq are the Tigris and Euphrates rivers. Both of these rivers have their origins in Turkey and converge at the Shatt al-Arab waterway that flows into the Persian Gulf.
The Tigris river flows south from the mountains of southeastern Turkey, passing through Iraq before emptying into the Persian Gulf, while the Euphrates river flows through Syria from Turkey before entering into Iraq.