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 , fishermen , and industry leaders vie for unrestricted access to this river , but such freedom could destroy the resource , and conservation methods which should be planned in advanced by individuals , organizations , or governments are necessary to protect the river for future use. Conflicts worsen when a natural resource crosses political borders . 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 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 could the river and adversely affect many organisms such a fish and important aquatic plants that require clean , clear freshwater for surival.55: what is the main idea of the passage ? A: natural resource shortagesB: agricultural irrigation
C: the headwaters of a major river
D: conservation conflicts
56: which word in the passage means ( a promise that something will be done or will happen , es pecially a written over a particular period of time) ?
A: shortage
B: guarantee
C: population
D: habitat
57: what mau bring water to agricultural irrigation?
A: a river
B: topsoil
C: erosion
D: a forest
58: which of the following sentences is true ?
A: conflicts improve when a natural resource crosses political borders
B: the source of a main river may be located in the country through which the river flows than a different country
C: the way where one ordinary source is managed has a direct effect upon other ordinary sources .
D: there is assurance that the river source will be confined to provide accommodation for resource needs downstream .
59: what does the word ( arise ) mean ?
A: get up
B: sit up
C: stand up
D: spring up
60: which of th following is not true ?
A: farmers , fishermen, and industry leaders vie for open access to the river
B: conservation methods are incidental to care for the river for future use.
C: a river may provide water for agricultural irrigation , habitat for fish , and water - generated electricity for a factory .
D: arguments often surround how a resource should be used , or allocated , and for whom.
61: when do conflicts worsen ?
A: when eroded soil and silt could the river and affects many organisms.
B: when natural - resource shortage increase in the features of gradually
C: when free dom could destroy the resource .
D: when a natural resource crosses political borders.
62: what does the word ( supply ) mean ?
A: cover
B: provide
C: make up for
D: compen
63: what does the word ( methods ) mean ?
A: manner
B: orders
C: structure
D: ways
64: which word in the passage means (living or growing in , happening in , or connected with water )?
A: major
B: necessary
C: fresh
D: aquatic
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