It doesn't matter if you post an image instead of the
text. You may think that this stops her from simply
copying and pasting the work, but there are ways around it.
"Optical Character Recognition" software are websites or programs
that can grab the text from an image. They aren't perfect, but
they get the job done. I used your image and got this,

It might take them a little bit longer, but people that
steal work will still be able to do so