Answer:
<u>A common element among all the river valley civilizations was irrigation systems that moved water to crops and settlements</u>
Explanation:
- <u>River Valley civilizations where the civilizations that were found on the banks of the river like the Mesopotamia ,Indus valley civilization.</u>
- <u>These civilization where agriculture based civilization as they depended on river for drinking water and irrigational activities</u>
Answer:
B
Explanation:
i think their number increased in the next generation
322.15
49°C + 273.15= 322.15K
The mass is increased as two things are added together so the two masses of the two substances are added together.
