What are ‘thermal features,’ and how do they form in Yellowstone National Park?

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A) They are natural fountains formed by the high temperature of the earth’s crust, caused by volcanic activity.

B) They are artificial features created for the enjoyment of park visitors, using geothermal energy.

C) They are ice formations resulting from the extreme cold in the region.

D) They are rock formations caused by the erosion of the park’s rivers and waterfalls.

Quiz: What are ‘thermal features,’ and how do they form in Yellows