What is the best kind food to eat when u are on a diet. And what is the wores kind food eat?

Healthy diet. Eat whole, colored fruit and veggies. Seven servings / day. Protein: Egg whites, quinoa, white fish, lean poultry breast, lean sirloin, no animal fats, no saturated fats. Plant fats are good. No bread, sugar, pasta, pizza, corn, soft drinks, sugared juices, fast cereals. Oat meal and bran and grapenuts are excellent. Yogurt excellent. Cottage cheese good. Balance. Set calorie goal. Count calories.
BEST- A GOOD . Balanced approach consisting of complex carbs, protein, good fats, fiber and plenty of water. Bad- anything not already mentioned, especially simple sugars and excess fat.