What are the four approaches to writing an expository essay?

The four approaches to writing an expository essay are the descriptive approach, which details characteristics and features; the process or chronological approach, which explains steps in a sequence; the comparison and contrast approach, which highlights similarities and differences between subjects; and the cause and effect approach, which discusses reasons and consequences related to a particular topic. Each approach serves to clarify a specific aspect of the topic, allowing readers to gain a deeper understanding.