After the Number of Wolves Declined in Yellowstone National Park

question 54

Multiple Choice

After the number of wolves declined in Yellowstone National Park, ____.

• A) the ecosystem recovered and became more stable
• B) herds of elk, moose, and mule deer devastated willow and aspen trees near streams and rivers
• C) the elk population crashed
• D) forest fires decreased in frequency because the larger mule deer population controlled undergrowth
• E) coyotes took over their role in the ecosystem, leading to few changes

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