The technology that was ignored prior to the attack on the
Pearl Harbor was the radar. The reason that it was ignored during the attack
because of the fact that it wasn’t new or evolved and that it is still
considered to be experimental.
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.
Note that it is asking for the change between <em>1921 </em> and <em>1926</em>.
Look at the graph, and choose the term that fits the graph as a description.
C. Immigration from Southern Europe showed the steepest decline between both years.
Percentage wise, a drop from ~300,000 to < 25,000 is a large drop, even more than all the others.
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