In which regions were most of the wealthiest states found in 1860

I believe the answer is: Illinois, Indiana, Ohio, New York, Tennessee, Kentucky, Pennsylvania, Virginia, New Jersey, and Massachusetts.

These states was among the first states in united states to experience Industrial Revolution which influenced by the Great Britain. Due to massive increase in production, these states obtain the most wealth compared to other states who still used human labors.

b) the planets year length would be longer

hope this !

the boundarys like convergent divergent and transform it causes subduction