Tree diagrams break broad topics down into increasingly specific subtopics arranged hierarchically. They can be used to analyze processes, evaluate solutions, explain root causes of problems, and communicate details to others. Literature can be broken down into poetry, drama, novels, and short stories. Poetry has two branches of imaginative and realistic, while drama splits into comedy and tragedy. Novels come in many forms like historical, psychological, realistic, scientific, and regional. Short stories are close to life despite limited scope.