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The passage below is accompanied by four questions. Based on the passage, choose
the best answer for each question.
Over the course of the twentieth century, humans
built, on average, one large dam a day, hulking structures of steel and concrete designed to
control flooding, facilitate irrigation, and generate electricity. Dams were also lucrative
contracts, large-scale employers, and the physical instantiation of a messianic drive to conquer
territories and control nature. Some of the results of that drive were charismatic
mega-infrastructure—the Hoover on the Colorado River or the Aswan on the Nile—but
most of the tens of thousands of dams that dot the Earth’s landscape have drawn little
attention. These are the smaller, though not inconsequential, barriers that today impede the
flow of water on nearly two-thirds of the world’s large waterways. Chances are, what your
map calls a “lake” is actually a reservoir, and that thin blue line that emerges
from it once flowed very differently.
Damming a river is always a partisan act. Even
when explicit infrastructure goals—irrigation, flood control, electrification—were
met, other consequences were significant and often deleterious. Across the world, river control
displaced millions of people, threatening livelihoods, foodways, and cultures. In the western
United States, dams were often an instrument of colonialism, used to dispossess Indigenous
people and subsidize settler agriculture. And as dams slowed the flow of water, inhibited the
movement of nutrients, and increased the amount of toxic algae and other parasites, they snuffed
out entire river ecologies. Declining fish populations are the most evident effect, but dams
also threaten a host of other animals—from birds and reptiles to fungi and
plants—with extinction. Every major dam, then, is also a sacrifice zone, a place where
lives, livelihoods, and ways of life are eliminated so that new sorts of landscapes can support
water-intensive agriculture and cities that sprout downstream of new reservoirs.
Such
sacrifices have been justified as offerings at the temples of modernity. Justified by—and
for—whom, though? Over the course of the twentieth century, rarely were the costs and
benefits weighed thoughtfully and decided democratically. As Kader Asmal, chair of the landmark
2000 World Commission on Dams, concluded, “There have been precious few, if any,
comprehensive, independent analyses as to why dams came about, how dams perform over time, and
whether we are getting a fair return from our $2 trillion investment.” A quarter-century
later, Asmal’s words ring ever truer. A litany of dams built in the mid-twentieth century
are approaching the end of their expected lives, with worrying prospects for their durability.
Droughts, magnified and multiplied by the effects of climate change, have forced more and more
to run below capacity. If ever there were a time to rethink the mania for dams, it would be
now.
There is some evidence that a combination of opposition, alternative energy
sources, and a lack of viable projects has slowed the construction of major dams. But a wave of
recent and ongoing construction, from India and China to Ethiopia and Canada, continues to tilt
the global balance firmly in favor of water impoundment.
Question 22 : The word “instantiation” is used in the first paragraph. Which one of the following pairs of terms would be the best substitute for it in the context of its usage in the paragraph?
The first paragraph describes dams as the ' physical instantiation of a messianic
drive to conquer territories and control nature'. Physical instantiation means concrete example.
Option 4- exemplification and manifestation- would be the best substitute for the term in the
given context.
The question is " The word “instantiation” is used in the first paragraph. Which one of the following pairs of terms would be the best substitute for it in the context of its usage in the paragraph? "
Choice 4 is the correct answer.
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