It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
This image was acquired from
Keywords from Image Description:
Alp mountains covered with snow. en Alp mountains covered with snow Image from Public domain images website publicdomainimage html publicdomainimage Rosendahl File Alp mountains in snow PDauthor Rosendahl Images uploaded by Publicdomainimage Unidentified locations in the Alps
Page 2017 Free-images.com. All images are Public Domain