This question has two parts. Answer Part A, and then answer Part B.

Question

,begin emphasis,Part A,end emphasis,
What does the phrase ,begin emphasis,highly dynamic and variable,end emphasis, indicate about the mountains and canyons of Yellowstone in the first sentence of paragraph 2?

Question 1 Answer options with 4 options
1.
They are extremely old features.

2.
They are mainly why the park exists.

3.
They are especially popular with visitors.

4.
They are continually undergoing changes.

Question 2
,begin emphasis,Part B,end emphasis,
Which detail from the passage ,begin emphasis,best,end emphasis, supports the correct answer from Part A?

Question 2 Answer options with 4 options
1.
"processes over the last 150 million years" (Paragraph 1)

2.
"define the natural wonder" (Paragraph 1)

3.
"active volcanic, hydrothermal (water + heat), and earthquake systems" (Paragraph 2)

4.
"extraordinary geysers, hot springs, mudpots and steam vents" (Paragraph 2)

Answer 1

Part A: The phrase "highly dynamic and variable" indicates that the mountains and canyons of Yellowstone are continually undergoing changes.

Part B: The detail from the passage that best supports this correct answer is "active volcanic, hydrothermal (water + heat), and earthquake systems" mentioned in Paragraph 2.