Multiple choice Why are proteins called body building foods? They provide energy to our body. They protect our body against diseases. They are needed for the growth and the repair of our body. They regulate the water level in our body. Reveal answer Fill a bubble to check yourself C Correct answer Explanation Each nutrient of the balanced diet has a particular function to perform in our body, e.g. proteins are the building blocks for the body because they are required by the body for its optimal growth and repair of worn out tissues.