1. It narrows your subject to a single, central
idea that you want readers to gain from your essay.
2. It names the topic and asserts something
specific and significant about it.
3. It conveys your reason for writing, your
4. It often provides a concise preview of how
you will arrange your ideas in the essay.
The Little Brown Compact Handbook, 4th Edition,
University of Phoenix, Jane E. Aaron.