Answer:
Between 1830 and 1850, immigrants who moved to American cities often faced crowded living conditions in poor neighborhoods. The Industrial Revolution opened many new job opportunities for people. Americans that lived in the rural areas of the country moved to the larger cities where the factories were located.
Mt. Elbert is the highest peak in the Rocky Mountains
The resulting imbalance between incoming solar radiation and outgoing thermal radiation will likely cause Earth to heat up over the next century, accelerating the melting polar ice caps, causing sea levels to rise and increasing the probability of more violent global weather patterns.
I believe your answer would be
A. increase
I hope that helps u!