This artist was hired by the Sierra Club to create a book of photographs of American parks. The book was distributed to Congress, and successfully convinced its members to pass legislation that would preserve American parks by creating a number of national parks and preserves.

Ansel Adams created photographs for the Sierra Club’s book This Is the American Earth, which presented the beauty of America’s wild places. The book helped build support for conservation legislation, including the Wilderness Act of 1964. Therefore, the correct choice is Ansel Adams.

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