Answer: See explanation.
Explanation:
Because Astronomers have well-tested theoretical models that explain how a star evolves over the course of its life as well as well-tested theoretical models that explain how a star evolves over the course of its life.
And scientists say it will take natural processes 6,000 years to refill the reservoir
The answer is, I believe, the Grand Canyon.
I think the answer is A
Hope this helps!!:)
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