D is correct. There is fish in the water which provides lots of food. Boats can go up or down the river to transport items. Water is a basic need for humans so for a population to grow you need a good water source. Hope this helps! ;)
The correct answer is D. The river provided people with water, food, and transportation is the best answer choice. Civilizations needed basic amenities to survive and thrive. Those necessities were clean water for drinking or bathing; food produced by the watering of crops from the river or animals that drank the river's water; and transportation, usually by boats.
