Which statement about the Nile River valley is not true?

None, apparently.

To determine which statement about the Nile River valley is not true, we need to examine the various statements available and analyze their accuracy. Here are a few possible statements pertaining to the Nile River valley:

1. The Nile River valley is located in Africa.
2. The Nile River is the longest river in the world.
3. The Nile River valley was home to one of the earliest civilizations.
4. The Nile River flows southward.

Now, let's evaluate each statement:

1. The statement, "The Nile River valley is located in Africa," is true. The Nile River is situated in northeastern Africa, spanning across multiple countries such as Egypt, Sudan, South Sudan, Ethiopia, and Uganda.

2. The statement, "The Nile River is the longest river in the world," is also true. The Nile River stretches approximately 6,650 kilometers (4,130 miles), making it the longest river globally.

3. The statement, "The Nile River valley was home to one of the earliest civilizations," is true. The Nile River valley was a vital region for ancient civilizations, such as the Egyptian civilization, which emerged along its banks around 3100 BCE.

4. The statement, "The Nile River flows southward," is false. The Nile River flows northward, originating from the south, specifically Lake Victoria, and eventually emptying into the Mediterranean Sea.

Therefore, the statement that is not true is: "The Nile River flows southward."