Which of the following is not a source of carbohydrates?

Hamburger meat does not serve as a source of carbohydrates because it is primarily composed of protein and fats. While carbohydrates are a macronutrient essential for energy, they are not present in significant amounts in animal tissues such as meat. Meats like hamburger provide high-quality protein and important nutrients like iron and B vitamins, but they lack carbohydrates.

In contrast, rice, pasta, and fruits are rich sources of carbohydrates. Rice and pasta are staple foods primarily composed of starch, a complex carbohydrate that provides energy. Fruits contain sugars, fiber, and various nutrients, making them another important carbohydrate source. Understanding the role of different food groups in providing macronutrients is essential for maintaining balanced nutrition.