Answer:
Thomas Malthus was an English economist and demographer best known for his theory that population growth will always tend to outrun the food supply and that betterment of humankind is impossible without strict limits on reproduction.
Reaper and steel plow were the machines invented by Cyrus McCormick and John Deere that made large-scale agriculture possible, especially on Midwestern prairies.
B) Reaper and steel plow
<u>Explanation:</u>
In the 1800's people used to do all the chores with their hands hence, it made farming a tough job and a lot of time consuming activity. During the industrial revolution, Cyrus McCormick invented a mechanical reaper, which would help reap big farms in very less time.
The steel plow played a very important role in the industrial revolution as the wooden plow used to be weak but John Deere's invented steel plow was strong and broke soil easily.
(C) Byzantines General who helped expand the empire .
The answer is C the roman empire
