Which substances are necessary for various bodily functions and can be obtained from food?

The correct choice highlights the role of minerals, which are essential nutrients that the body requires for a range of functions, including building strong bones, transmitting nerve impulses, and maintaining overall cellular function. Minerals such as calcium, potassium, and iron are vital, and they must be obtained through the diet, as the body cannot produce them.

While carbohydrates, vitamins, and proteins are also necessary for various bodily functions, minerals are often discussed in the context of their specific roles in enzymatic reactions and structural functions in the body, highlighting their unique importance in nutrition and health maintenance. Each of these categories plays a different role: carbohydrates are primarily a source of energy, vitamins are organic compounds that support metabolic functions, and proteins are crucial for building and repairing tissues. In this case, the emphasis is on minerals as they encompass a broader range of vital functions that the body cannot fulfill without dietary intake.