Which kind of image is indispensable and needs added text to go with it?

It seems that you have missed the essential choices in order to answer this question, but hope my answer helps. Based on what I have researched, the kind of image that is considered indispensable and needs added text to go with it would be a graphics or illustration. Usually, these needs added text to go with it in order to make it more vivid to the readers. Hope this helps.