Aids, because Africa does not have the medicine that's for a lot of diseases. Unlike the counties that's above the equator l.
The first person in space was Yuri Alekseyevich Gagarin, the space rocket, Vostok 1, that sent Yuri into space was manufactured by Energia,
<span>Many intellectuals and many of those working in development believe that the size of the world's population and its accelerated growth is the greatest problem and the gravest threat to humanity. Clearly, the ratio of the number of people to the amount of food available has an impact on nutrition, but how do these two factors interact? At the end of the eighteenth century the British political economist Thomas Malthus speculated that population growth could soon surpass production and food supply. By the end of the twentieth century, this had not happened, but malnutrition was widespread.</span>
Trench warfare is a type of land warfare using occupied fighting lines consisting largely of trenches, in which troops are significantly protected from the enemy's small arms fire and are substantially sheltered from artillery. The most famous use of trench warfare is the Western Front in World War I. It has become a byword for stalemate, attrition, sieges and futility in conflict.
Trench warfare occurred when a revolution in firepower was not matched by similar advances in mobility, resulting in a grueling form of warfare in which the defender held the advantage.[2] On the Western Front in 1914–18, both sides constructed elaborate trench and dugout systems opposing each other along a front, protected from assault by barbed wire, mines, and other obstacles. The area between opposing trench lines (known as "no man's land") was fully exposed to artillery fire from both sides. Attacks, even if successful, often sustained severe casualties
Answer:
1
Explanation:
Using the formula c = (k(k-1))/2
c = 2(2-1)/2
c = 1.
The numbers of comparison if k is equal to 2 is 1
