In which writing method do authors identify and explain differences and similarities between subjects?

The comparison-contrast writing method specifically focuses on examining and articulating the differences and similarities between two or more subjects. This involves analyzing various aspects of the subjects to highlight how they are alike and how they diverge. This method is effective in helping readers understand the nuanced relationships between different items, whether they are concepts, objects, or ideas.

In this context, the other writing methods serve distinct purposes. The problem-solution method is aimed at identifying a problem and proposing one or more solutions, which does not inherently involve comparing or contrasting the subjects. Descriptive writing is focused on portraying a subject in vivid detail, seeking to engage the reader's senses rather than to compare or differentiate. Narrative structure revolves around storytelling, emphasizing a sequence of events rather than a comparison of elements. Therefore, the focus of the comparison-contrast method on identifying and explaining similarities and differences makes it the correct choice in this scenario.