Answer:
There are two primary scales used to measure earthquakes: the Richter scale and the Mercalli scale.
Explanation:
The Richter scale is most common in the United States, while worldwide, scientists rely on the Mercalli scale.
Grain farming is done for economic activity and this makes it commercial. It is highly specialized and mechanised. The yield per acre is low so the farms are big. The yield is high per man so little manpower is needed for production. Grain farming is subject to market conditions like climate.
Answer: Somalia is located at letter <u>D</u>, and Sudan is located at letter <u>B</u>.
Explanation:
In the first image attached is shown the map of Africa with the letters, and in the second image the map with the name of the countries. As we can see, letter D corresponds to Somalia and letter B to Sudan.
In this sense, Somalia is located on the line of the Earth's equator and is the easternmost country in Africa. It is mainly composed of plains, plateaus and highlands. In addition, it maintains a warm climate throughout the year with inclement summers, except in the higher altitude territories of the north of the country.
On the other hand, Sudan is located in North Africa, on the shores of the Red Sea, between Egypt and Eritrea. It is partly crossed by the Nile and its tributaries. To the south its climate is tropical, while in the north it is desert, with daily temperatures exceeding 42 ° C.