What major advance was needed before cities could emerge in early civilizations?
A. Trade
B. Farming
C. the plow
D. iron tools
Please help!!

Which was the outcome of the six-day war of 1967

How would you describe the relationship between the major world religions today? how do those relationships manifest in the united states today?

What was zheng he’s most important accomplishment? zheng he spread chinese ideas and brought wealth to china from his travels. zheng he commanded an impressive fleet of ships. zheng he sailed the indian ocean and around africa. zheng he conquered lands as far away as africa to increase the dynasty’s power.