When each heading and subheading begins with the same type of word such as a noun this is called?

When each heading and subheading begins with the same type of Word, such as a noun, this is called "parallel structure" or "parallelism." This technique enhances readability and creates a cohesive flow in the text, making it easier for readers to navigate. It can also emphasize the relationship between different sections or ideas. Using parallel structure effectively can improve the overall clarity and impact of the writing.