This document provides information and guidance on writing cause and effect essays. It defines different types of causes such as necessary, sufficient, precipitating, and proximate causes. It also discusses organizing causes from most to least obvious or interesting, and analyzing logical relationships between causes and effects. The document recommends analyzing multiple causes for a single effect or a single cause with multiple effects. It provides examples of thesis statements and introduces different patterns of analyzing causal relationships like causal chains. Finally, it offers transitional phrases and expressions for linking causes and effects in writing.