I am pretty sure its D. I am not 100% positive but I read an article and that appears to be correct.
Fertile land and food supplies would be the answer
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The answer is A! Physical map, as it shows the height of things that are above or below sea level.
Hope this helps!! :(
The person who perfected the steam engine is the very known inventor and early-day scientist James Watt. His work on the steam engine made it widely used and one of the most profitable and turn-overable areas of the industry during those times.