During the middle of the twentieth century, the Arabian countries flourished economically and they quickly started to change and to modernize. The reason why they were able to do so, and do it so quickly, was that they had the largest reserves of oil and natural gas. The oil especially was bringing in enormous amount of profit to them as it was the most demanded natural resource in the world. Because such enormous amount of money were coming in these countries, they were able to transform themselves very quickly, thus becoming countries where everything was modernized and of the highest standard. One thing that has to be noticed though is that these countries were not producing for themselves, nor did they developed any other industries, but pretty much everything was and still is imported.
America
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They trade because all countries may not have enough supplies/ resources, so they trade in order to obtain them
Fossils help scientists date rocks: True
Sometimes younger rock layers are found beneath older rock layers: True, because it happens with landslides and other causes.
No fossils from the Precambrian era have been found because there were no organisms at the time: False because there were organisims like algae and bacteria, and there are a very small amout of fossils from that era.
The map of Earth has changed over millions of years, but is now set: False
Answer:
Option B
Explanation:
Vertical farming is advantageous over the traditional farming practices in the following ways
a) It require lesser area
b) It uses less water as compared to the water used in traditional farming
c) Different types of crops can be grown at one one time as the same plot area is not used.
Growing crops for a year in not an advantage of vertical farming and hence option B is the correct answer