Answer:
stargazing
Explanation:
they were very advanced in astronomy
Answer:
i believe it is true plz dont report me if wrong
Answer:
Irrigation highly depends on water sources in order for it to work. Without clean water, crops will die and wither. And polluted water causes filthy and contaminated trade routes, which are unsafe to travel across. Also, education has water fountains in the buildings (not sure now cuz of corona but clean water is used in school buildings.
Explanation:
Using irrigation system was the practice closely associated with most ancient river valley civilization.
