The countries in the Horn of Africa are Djibouti, Eritrea, Ethiopia and Somalia. The smallest country in the Horn of Africa is Djibouti, whose capital shares the same name as the country (Djibouti). The Horn of Africa covers the part of Africa that is the most eastern part of the continent and Djibouti lies not far from the Arabian Peninsula, with only a little bit of waterway (the sea) dividing it from Yemen. Djibouti is a multi-ethnic country with Arab and French being the two main languages.
42% or more of the population make a living by agriculture sooo....D.) Farming
The Mongols set up a tribute empire called The Golden Horde. Serfdom arose as peasants gave up their lands to the aristocracy in exchange for protection from the Mongols. Moscow benefited financially by acting as a tribute collector for the Mongols. Mongol rule kept Russia culturally isolated from Western European trends such as the Renaissance.
B: China and India both have a population around 1.5 billion people so in total they have around 3 billion people combined! That is more than the continent of Africa and North America combined!