While it was true that western lands were somewhat more fertile than the now-depleted lands of the East, many of the pioneers were attracted to the frontier in order to speculate in land, i.e. to purchase large quantities of cheap government land and to sell it at a profit to later comers
D. mound builders
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The fact that Italy is shaped like a boot made it a good place for ships to stop because a lot of cities were on the water, and cities were a perfect place to sell or trade goods. Hope it help!
Because they had all they needed where they where at
The steam engine now allowed materials to be transported into different factories.
