Get your subject. Then the sources or resources you use to help find some facts or information are the bibliography.
Practically anyone who eats too much fatty food and doesn't exercise.
Obesity is growing, especially in the US. I believe there are more people overweight than what their normal weight shoudl be.
Yes. Also, Annotated Bibliography should be centered but not italicized, underlined,enclosed in quotation marks, etc. It should be typed in the same font as the essay.