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Snezhnost [94]
3 years ago
10

The descriptive study usually takes the form of an experiment . has its major emphasis on the discovery of insights and ideas .

is concerned with the determination of a cause‑and‑effect relationship . is concerned with determining the frequency with which something occurs . has as its main objective the establishment of priorities for future research .
Social Studies
1 answer:
Greeley [361]3 years ago
5 0

Answer:

Is concerned with the determination of a cause-and-effect relationship.

Explanation:

Descriptive studies frequently takes the form of an experiment because the researcher often wants to know which variable causes certain behaviour that he's studying.

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Desertification has become a major issue in Africa, specifically in sub-Saharan Africa. The area most at risk is the Sahel, the area that borders the southern edge of the Sahara.


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This region serves as a “transition” between the desert and savanna the grasslands that dominate much of sub-Saharan Africa. The centrally-located tropical rainforest region is not immediately affected by the threat of desertification.


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The term “desertification” refers to the growing size of deserts, but in this case the Sahara. There are many causes of desertification: some are naturally occurring while others are caused by humans. The most common natural cause is drought, which is something you might associate with the desert itself. However, this situation can cause great harm to soil, making it unusable and causing<span> erosion</span> by wind or human activity.


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As far as human activity goes, there are number of them that cause desertification. Cattle ranching- a common occupation in much of rural Africa- can cause overgrazing. Additionally, the need for more and more food to feed people in and outside of Africa results in over-farming. In both cases, these practices cause soil to become more exposed to the sun and the increasingly dry weather. As the soil loses nutrients and is loosened by other forces, it ceases to be able to grow any plant life, creating a situation in which the desert may slowly begin to creep into an area.


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The effects of desertification can be catastrophic. Starvation is the most common effect, and one that is not quickly or easily solved. Soil that is unusable can take many generations to replenish. Similarly, ending or slowing down desertification is cannot be done with a single effort. Military campaigns are being undertaken in Africa, encouraging the use of beneficial practices such as crop rotation and smarter ranching practices in order to prevent further soil depletion.


(Crop rotation helps prevent desertification by reducing soil erosion. By growing different types of crops in the same area, the nutrients will not be depleted. Military campaigns were urged by the UN because of the growing problem desertification has caused.)

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