Complex sentence: Two scholarly approaches use biography as a tool for interpreting literature, literary biography and biographical criticism, and two genres of fiction rely very heavily on the incorporation of biographical elements, biographical fiction and autobiographical fiction.
Split into simpler sentences: Two scholarly approaches use biography or biographical approaches to the past as a tool for interpreting literature including literary biography and biographical criticism. Additionally, two genres of fiction rely very heavily on the incorporation of biographical elements into their content, biographical fiction and autobiographical fiction.