Jawaban:

Junk food is food that is typically unhealthy and rich in fat, salt and sugar. These foods can cause various health problems, including obesity, heart problems and diabetes. Udin may be sick because he often eats junk food, which can cause various health problems.

To maintain his health, Udin should reduce his consumption of junk food and eat healthier foods such as vegetables, fruits, and healthy proteins. This will help Udin maintain his health and stay away from health problems that can be caused by junk food.