14. No the fire is not alive because it does not contain any cells (think of the characteristics of all living things)
15. It is important to eat a balanced diet because since everything in our body such as organs is cells they need the energy and nutrition to function well, and have maintain and produce pathogen/viral/bacteria fighting cells.
16. The food that you could eat that contains nucleic acids/nucleotides are meat since animal muscle has ATP molecules. Seafood also has this.