An affect of transportation improvements on settlements was that

The development in transportation help the settlers reach the place that cannot be reached. It also make the people became more willing to live in a pretty far distance for their workplace, which increase the number of settlements even in places that have lesser amount of job opportunities.

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codfish influenced the yankee trade because they traded it with the americans and the americans traded livestock, molasses and stuff that they can make clothes out of (like wool, and leather). they also could make weapons to.

on my last question