Final answer:
The subject of this question is Fast Food and the best type of food for weight loss is vegetables.
Step-by-step explanation:
According to the information provided, the subject of this question is Fast Food. The question asks which type of food will help the most with weight loss out of fats, vegetables, lean meats, and fruits. In terms of weight loss, the best option would be vegetables because they tend to be low in calories and high in fiber, which can help promote feelings of fullness and aid in weight management. While lean meats and fruits can also be part of a healthy weight loss plan, it is important to prioritize vegetables for their nutritional content and low calorie density.