Answer:
Catastrophism.
Explanation:
According to Geology, there's a theory which held that surface, mountains, lakes, were created by suddenly because of great catastrophes like earthquakes and floods.
There were a lot of cities back in the east, and populations were rising. People began moving west and building farms, raising cattle, and other animals. Originally, people arrived in the east by ship (from England etc.), but when people traveled to the west they went by wagon trains. In the south people grew things like cotton, sweet potatoes, tobacco, and sugar, while in the west they grew things like apples trees, wheat, and raised herds.
In the west they build small, compact log cabins, while in the east there were factories, larger brick buildings, and marinas for traded good from other countries.
That is how growth differed in the east cities and the west.
summary;
1. People who traveled to the west started from the east. But those people from the east originally came from England, who then settled in the eastern United States. 2. The mode of transportation to their new lives was different, (ship vs. wagon train.) 3. Log cabins in the west vs. larger bricked buildings in the north east.
Overgrazing causes desertification. This issue can be solved through rotational grazing.
Pollution and climate change
<span>The answer is letter A.
Ice Age or glacial period refers to the extended period of well-below-average temperatures. It is a prolonged period where reduction in the temperature of the Earth’s surface and atmosphere are caused by the expansion of continental and polar ice sheets and alpine glaciers. Usually this phenomenon occurs in the northern and southern hemispheres where extensive ice sheets are seen most.
<span>At present we are now experiencing an interglacial period after the Holocene Ice age.</span>
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