Cause/Effect:
The cause/effect essay explains why or how some event happened, and what resulted from the event. This essay is a study of the relationship between two or more events or experiences. The essay could discuss both causes and effects, or it could simply address one or the other. A cause essay usually discusses the reasons why something happened. An effect essay discusses what happens after a specific event or circumstance.
The below example shows a cause essay, one that would explain how and why an event happened.