A. NEIGHBOR B. CORRECT C. DINNER D. HARROW VI. READ TH...

Câu 31. A. neighbor

B. correct

C. dinner

D. harrow

VI. Read the passage below carefully, and then choose the best answer:

Conservation conflicts arise when natural-resource shortages develop in the face of steadily

increasing demands from a growing human population. Controversy frequently surrounds how a

resource should be used, or allocated, and for whom. For example, a river may supply water for

agricultural irrigation, habitat for fish, and water-generated electricity for a factory. Farmers,

fishers, and industry leaders vie for unrestricted access to this river, but such freedom could destroy

the resource, and conservation methods are necessary to protect the river for future use.

Conflicts worsen when a natural resource crosses political boundaries. For example, the

headwaters, or source, of a major river may be located in a different country than the country

through which the river flows. There is no guarantee that the river source will be protected to

accommodate resource needs downstream. In addition, the way in which one natural resource is

managed has a direct effect upon other natural resources. Cutting down a forest near a river, for

instance, increases erosion, the wearing away of topsoil, and can lead to flooding. Eroded soil

and silt cloud the river and adversely affect many organisms such as fish and important aquatic

plants that require clean, clear freshwater for survival.