Which of the following statements belongs in the box labeled “a” on the chart above? a. protects the ecosystem of the nile river delta b. controls the floodwaters of the nile river c. decreases the amount of arable land d. prevented the relocation of thousands of families

B. Controls the floodwaters of the Nile River

Nigeria and south africa

Aregion is an area of land that has common features. these features can be natural, such as climate or landscape. they can also be artificial, such as language or religion. the xinjiang uyghur autonomous region, above, is an area of china inhabited by uyghurs, a muslim group with ethnic ties to turkish people.