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.
Perhaps you have been assigned a comparative essay in class, or need to write a comprehensive comparative report for work. In order to write a stellar comparative essay, you have to start off by picking two subjects that have enough similarities and differences to be compared in a meaningful way, such as two sports teams or two systems of government. Once you have that, then you have to find at least two or three points of comparison and use research, facts, and well-organized paragraphs to impress and captivate your readers. Writing the comparative essay is an important skill that you will use many times throughout your scholastic career.