1) Why are fast foods so affordable?

2) why is fast food so convenient?

3) why is fast food detrimental to our health?

I need each response to be 4-5 complete sentences long, Formal&correct punctuation&good grammar. and Closing sentences.

The fast food are affordable as it is cheap. It also convenient because it will take only a few minutes to prepare it. However, fast food bring negative impact to our body. It is because the fast food mix with chemical substances that are not good for our body. As the conclusion, we can eat fast food but we cannot make it as our daily food