A biggie: the transcontinental railroad. Because it would economically improve wherever it was, both the North and the South competed for the railroad to be in their respective territory, evidenced by the Kansas-Nebraska Act and the Gadsen Purchase and induction of California as a free state in 1860.
In addition: people could get land cheap because it was abundant and might leave to start afresh economically.
There's other stuff I can't remember as clearly, but there's a little and I hope it helps :)
For lumber it is where it is rainy but not flooding in rain because if it is flooded in rain it will have rotten layers inside making it bad to use and will not be safe to use.
A - Wind carries sediments to a new location
B.) "Equator" <span>divides our planet into the northern hemisphere and the southern hemisphere
Hope this helps!</span>
