4. Which of the following nutrients help deliver oxygen to the blood? A. Iron B. Zinc C.Fluoride D. Phosphorus a B

The correct answer is A. Iron.Iron is an essential nutrient that plays a crucial role in the transportation of oxygen in the blood. It is a component of hemoglobin, a protein found in red blood cells that binds to oxygen and carries it from the lungs to the rest of the body. Without sufficient iron, the body cannot produce enough hemoglobin, leading to conditions such as anemia.