I think the answer is diminishing marginal utility
The Second Industrial Revolution was a period of rapid industrial development, primarily in Britain, Germany, and the United States, but also in France, the Low Countries, Italy, and Japan. It was characterized by the build out of railroads, large-scale iron and steel<span> production, widespread use of machinery in manufacturing, greatly increased use of steam power, </span><span> use of petroleum and the beginning of </span><span>electrification. However, d</span>uring the second industrial revolution access to raw materials has decreased.
The answer to your question is A. I hope this is the answer that you were looking for.
Hi. I think the details of what the author said were not included in your post. I researched and found similar question but with the additional information. Here's my answer:
According to the author, the conditions in Europe during 800's was chaotic. The Frankish Empire was disintegrated to federation of feudal lords, Church did not have power, knights forcing the peasants to pay taxes. Muslims controlled Spain.
Answer:
Archaeologists also excavated a ditch for 30 feet. For thousands of years, farmers all over the world have used irrigation—diverting water from streams and rivers to water their fields. The Ancestral Puebloan people in the Four Corners region irrigated small plots of corn, bean, and squash. Mormons used this strategy in a big way.
