ct the correct details in the passage.
Which two details provide the best evidence that
prairies "respond to their environment"?
R
in (4) Prairies exist in areas too wet for desert yet too dry to support healthy forests. Prairies respond to their
environment, which includes soil type, water availability, and natural forces such as grazing and fire. These have
resulted in three distinct prairie regions. In the West, in the dry Rocky Mountain rain shadow, there is the ankle high
short-grass prairie with its buffalo grass and blue grama. The eastern prairies are wetter and support tallgrass prairies
with Big bluestem, Indian grass, and Switch grass growing to heights of eight feet at times. Between lies the mid-grass
prairie dominated by side-oats grama and wheatgrass, with a mixture
of shortgrass prairies in dry sites in and tallgrass in
wetter sites. The prairie is well known for its fauna. Some authors have estimated that there were between 30-60
million bison roaming the prairies. Elk, deer, and antelope also grazed in astounding numbers.
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