The correct answer is C. Nile
Step-by-step explanation:
First human civilizations developed in river valleys as these locations offered access to water, which was an essential resource for agriculture, raising animals and transportation. This included the Ancient Egypt civilization, which developed along the Nile River in the territory that is now Egypt in North Africa. This civilization emerged around 3100 BC and was known due to the development of a complex writing system (hieroglyphics) and its dynasties. Additionally, in the map described the location of the Nile river valley is shown by letter A because the Nile river valley covers the territory near to the Nile River, the area where the Ancient Egypt or Nile River Valley Civilization developed.