Example: Imagine that you want to write a descriptive essay about your grandfather. You've chosen to write about your grandfather's physical appearance and the way that he interacts with people. However, rather than providing a general description of these aspects, you want to convey your admiration for his strength and kindness. This is your reason for writing the descriptive essay. To achieve this, you might focus one of your paragraphs on describing the roughness of his hands, roughness resulting from the labor of his work throughout his life, but you might also describe how he would hold your hands so gently with his rough hands when having a conversation with you or when taking a walk.
Is it a historical photograph or a photograph published in a book that someone scanned and posted on line, is it a photograph of something like a sculpture? Is your paper focused on the work of the photographer, the makeup artist who prepared the model, the digital image enhancer who altered the image, the model? There is no single correct way to cite a photograph, because there are many different reasons to cite a photograph. Your instructor would be able to give you more specific advice. In general, though, the 8th edition of the MLA guide would say something like this:
My 6th graders are progressing through their argumentative essay. I’m providing mini lessons along the way that target where most students are in their essay. Your suggestions will be used. I’ve chosen to keep most writing in class and was happy to read that you scheduled a lot of class time for the writing. Students need to feel comfortable knowing that writing is a craft and needs to evolve over time. I think more will get done in class and it is especially important for the struggling writers to have peers and the teacher around while they write. Something that I had students do that they liked was to have them sit in like-topic groups to create a shared document where they curated information that MIGHT be helpful along the way. By the end of the essay, all will use a fantastic add-on called GradeProof which helps to eliminate most of the basic and silly errors that 6th graders make.