B. helped prevent and cure diseases like tuberculosis and polio.
Answer:
The American indians adapted to solve the problem of scarcity of food by growing crops by taking dead fish to fertilize the soil.
I hope this helps.
Answer:
Explanation: Archimedes is especially important for his discovery of the relation between the surface and volume of a sphere and its circumscribing cylinder. He is known for his formulation of a hydrostatic principle (known as Archimedes' principle) and a device for raising water, still used, known as the Archimedes screw.
Mongols affected Ancient China by attacking most of China's north. In the Qin Dynasty, Qin Shi Huangdi joined up smaller walls in the north which became the Great Wall of China
Most native american deaths resulted from disease brought from the old world (Europe)
