How did building new england towns and cities around a common colonies develop a diverse economy?

The correct answer is by making it easier to trade goods

They would all trade with each other and produce diverse goods and this made it possible for all regions to develop and for wealth to accumulate and grow with various people in different colonies, which meant that they could all grow without inhibiting one another.

In the midwest because it has more moderate climate than the north or south west which makes farming far easier.