Which was not a factor in the development of cities in mesopotamia?

1.plentiful food supplies made it easier for trade and new jobs.

2.silt left behind by floods made the soil fertile and could grow more food.

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3.many natural barriers- such as mountains- led to less warfare in the region.

4.the development of irrigation systems allowed water into drier areas and

the population grow.

3.Many natural barriers- such as mountains- led to less warfare in the region.

Explanation:

Mesopotamia actually had no natural barriers, which created a lot of problems for the city-states that were created in that region. They were practically defenseless, and that is why from the beginning they were under attack of several different tribes, mostly from the north.

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.

(b) britain had a much larger navy than the u.s.

(d) the u.s. had a small army compared to britain.