When looking for JPG images to accompany your articles, it is important to use high-quality, legal sources:
Images play a crucial role in modern articles by attracting attention and reinforcing the information provided in the text. For most digital publications and photography, is the standard file format because it uses lossy compression to keep file sizes small while maintaining high color depth—up to 16.8 million colors. How to Find and Download Images
Public domain. If you can find a usable image in a book or journal article published before 1927, it will be in the public domain, Georgetown Libraries Images in scientific writing - PMC