The original export file, index.html, worked okay on a laptop or desktop. The image always appeared and was resized correctly no matter how small the web browser window was shrunk.
I invoked the responsive website and clicked the link for this RSD-generated page on both the Opera Mobile Emulator and my own real Android smartphone. No image appeared.
After much head scratching and numerous other tries, I decided to investigate the generated HTML code. I made changes to the index.html file and saved it as index1.html. The modified file, index1.html, seems to work fine on all my devices.
Screen shots of both files are attached.
So, the questions are:
1) How or why is all the extra code around the <img> generated? Is it necessary?
2) Is my problem really just a problem with certain web browsers on certain mobile devices?
If you need any more information than the two HTML files, let me know.