If you can't find public domain content that fits your needs, Creative Commons-licensed content can be a good alternative.
Creative Commons is a non-profit organization that offers an alternative to copyright licenses for creators who want to share their work. You may be able to freely use CC-licensed content in your own work, depending on the type of license covering the content. A Creative Commons license does not provide unlimited permission to use content without exceptions; you must provide proper attribution and ensure your use does not violate the license.
