When writing this essay you should be able to provide specific facts about who is represented in each painting and things such as titles, artists, and dates.
Try to develop a main idea and use it to describe the evolution of the iconography and form concerning the depiction of these paintings. Use these works as specific examples, do some comparisons. Point out elements and how things like paint handling and color effect the meaning in each work. Discuss where they are and what they mean. Use as many facts as you can to support your ideas. A good answer will be a minimum of five sentences a better answer will be much longer. Use as much specific vocabulary as possible concerning formal elements. (Don't forget color too and genre imagery!)