The answer is A as river valley civilizations relied on rivers as a source of life. River valleys like Egypt, Mesopotamia and Xi, the rivers brought silt and made the soil very fertile, it also brought fresh water and fish to eat. People can also move fast using rivers.
Answer;
Comet, waves in the lake, flames shot through the sky.
Explanation;
-Quetzalcoatl is often referred to as The Feathered Serpent and was connected to the planet Venus. He was also the patron god of the Aztec priesthood, of learning and knowledge.
-The return of Quetzalcoatl represents the time when the one who occupied the flying serpent in Eden, would return to occupy a physical body on earth; this time, for the purpose of reigning.
One thing they adopted is the Mayan calendar
The Assyrians were war-like civilization, but they were disadvantaged technologically, scientifically, and politically compared to the neighboring civilizations, like the likes of the Babylonians, Egyptians, Phoenicians. So in order to progress and become stronger, and thus to manage to enlarge their empire and become a power house in the region, their leaders started to borrow and learn from the neighboring civilizations, and little by little they reformed the Assyrian society and way of functioning. This contributed to the Assyrian civilization to become very strong, and they managed with their military campaigns to gain much more territory and wealth which made them what they wanted, a power house in the world they knew.