Which invention ensured that raising wheat would remain the main economic activity in the midwestern prairies?
a. mechanical horse
b. mechanical reaper
c. steel thresher
d. steel-tipped plow

B. mechanical reaper

Explanation:

According to my research on older farming machinery, I can say that based on the information provided within the question the invention that insured this was the mechanical reaper. This was a machine that was attached and moved by horses in order to collect the wheat from the fields at a significantly faster manner than by hand. This increased productivity dramatically which in term increased cash inflow.

I hope this answered your question. If you have any more questions feel free to ask away at

architecture i think.

i hope this !

where is the diagram