Name the river that flows through Baghdad.

The Tigris River is the correct choice for the river that flows through Baghdad. It is one of the two major rivers of Mesopotamia, alongside the Euphrates River, and has significant historical and cultural importance in the region. Baghdad, the capital of Iraq, is situated on the banks of the Tigris and has been a vital center for trade, culture, and civilization, especially during the Islamic Golden Age.

The Nile River does not flow through Baghdad; it is primarily associated with Egypt and flows north through northeastern Africa before emptying into the Mediterranean Sea. The Amazon River is located in South America, flowing primarily through Brazil, and has no connection to Baghdad or the region of the Middle East. While the Euphrates River is also a prominent river in the area, the specific question pertains to the river flowing through Baghdad, which is the Tigris.