Who took the photograph above? Why was it taken? What was it's purpose?

Ansel Adams is the photographer who tool this picture, He 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 Easton Adams was an American landscape photographer and environmentalist best known for his zone system, a black-and-white image-making technique.
To know more about Ansel Adams, refer to the link:
https://brainly.com/question/17247334