How was Selma Lagerlöf awarded the Noble Prize in Literature?

Name: Selma Lagerlöf
Real Name: Selma Ottilia Lovisa Lagerlöf
Date of Birth: November 20, 1858
Birth Place: Mårbacka, Sweden
Died: March 16, 1940
Death Place: Mårbacka, Sweden
Nationality: Swedish
Education: Uppsala university
Popularly Known: Member of the Swedish Academy in 1914
Noble Prize Year: Nobel Prize for Peace in 1909, in appreciation of the lofty idealism, vivid imagination, and spiritual perception that characterize her writings.