Based on the sentence provided and the context of the passage, the two ideas that correctly convey the author's point of view are:
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The author thinks that the diversity of life in Glen Canyon is useful to scientific study. - This is supported by the mention of "limitless opportunities for research" in the context of the ancient history of the landscape.
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The author thinks that the landscape of Glen Canyon provides many sources of inspiration. - The phrase "personal revelation" indicates that the author believes the landscape can inspire individuals in meaningful ways.
The other options do not reflect the author's views as expressed in the passage.