When beginning to write, it is helpful to determine the patterns of development that are most effective for your purpose and audience. Some general patterns of development are:
Cause and Effect details why something happens, what causes it, what are the effects and how it is related to something else.
Classification and Division groups items into their parts or types.
Compare and Contrast tells how something is like other things or how something is different from other things.
Definition explains what something is in comparison to other members of its class, along with any limitations.
Description details what something looks like and its characteristics.
Exemplification provides typical cases or examples of something.
Narration describes what, when, and where something happened.
Persuasion describes an issue and your position or opinion on the subject.
Process explains how something happened, how it works or how it is made.