I believe it would be agriculture which brought them more money thus leading to a stronger economy.
The process of electing a president changed after the elections of 1800 by the election of 1800 showing weaknesses of Article II, Section 1 of the Constitution, this instructed how the president was to be elected.
cause weather is just like that lol
In the earths mantle the convection currents pass through the mantle which then causes friction in the tectonic plates causing earthquakes,volcanoes or tsunamis