I don't think this picture is really enhanced by dividing it into three. The drawer pulls seem to be out of line after the crop as does the plant on the right. You might have done better just to crop in on the table top and omit the bottom part of the table.
Very nice classical triptych. Not many of them in this challenge. I would of moved the book in to keep the balance of three or had the lamp overlap into the other panel.
How does the division of your picture into three frames enhance the photo? How does this "tell...a story or illustrates a concept or object" better than the original image?
I know this meets the challenge, but I am not a big fan on just cutting up one nice shot into 3 with distracting borders. Seems to easy, no real creativity required. I do not like the color of your border, but I do like your choise of a non-white non-black border. perhaps the green form the plants or the planters tan color would have been a bit better.