Answer:
C. Nile River Valley
Step-by-step explanation:
The landform circled on the map is Nile River Valley as it shows a fine blue stream of the river.
The Nile River Valley begins in Ethiopia and flows into Sudan from the southeast. The Nile River Valley is the world's longest river and it was the site of the world's first great civilization in Egypt.
Hence, the correct answer is "C. Nile River Valley".