Answer: A - Culture
Explanation: Religion and Language are aspects of culture, and culture is basically the lifestyle a certain group of people live, and culture often unifies groups of people across a certain area, such as The Middle East and Latin America.
OK so when I did this the answer was a and I got it right
The Great Wall stretches across North China from east to west for over 6,000 kilometers. It extends from the shanhai pass at the seaside in the Hebei province in the east to the Jiayu pass in Gansu province in the west.
Naturalists of Steno’s day were becoming convinced that matter was composed of different combinations of tiny “corpuscles”—what today we would call molecules. Steno argued that the corpuscles in the teeth were replaced bit by bit, by corpuscles of minerals. In this gradual process, the teeth didn’t lose their overall shape as they turned from tissue to stone.
The farmers in the area are mostly subsistence farmers, as the region is very hot, and arid,making agriculture unviable. as a result there is famine and drought in the area, as well as nutritional issues.