who took the photograph above? why was it taken? what was its purpose?

Can i Please have the picture so i can better understand the question

Explanation:

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.

that picture though

(a) i got it right on the test