Answer: Because
Explanation: Because is the only word that fits here and is gramatically correct in the first place, neverminding the fact that it says "Best Completes" <em>Because</em> is the only word that is gramatically correct in this situation.
Obesity is a problem very difficult to get rid of because of all the junk they put in our food, obesity can cause heart problems and the heart is very important to the body
A story presented as a play