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:
acorn cluster oak seed nut green leaf beginning create natural growth seed begin productive life reproduce renew tree forest environment wood ecology conservation eco ecosystem earth fall autumn season leaves outdoor botany october november bunch squirrel food stem dry harvest foliage
Page 2017 Free-images.com. All images are Public Domain