Health.

   In my opinion, teenagers must be educated to consume healthier food from an early age. Children must learn at school and specially at home that food they should or should not eat. But, unfortunately, nowadays there are more obese children without any education to consume healthier food.
   Also, almost all the population is fed by junk food, and for this reason about a 80 per cent of people prefer a piece of pizza before than an apple. Moreover, if you do not consume healthier food you have a lot of risk of developing diabetes in the early teens.
   In conclusion, I believe eating healthier food is very easy and all the people should do it.