Geothermal plateau. I'm only guessing, but since a lot of places use heat as energy it only makes sense.
I'm pretty sure it's the national road
Answer:
Some effects is that not all the people got a job
Explanation:
I believe the correct answer is D
A because all of those trends have to do when the american revolution becaise the slave trade was very popular in that time period, it was a very diversity subject in the american revolution