Calcium builds bones and teeth; activates enzymes throughout the body. It helps regulate blood pressure; and helps muscles to contract, nerves to send messages, and blood to clot and Iron helps make hemoglobin which is the oxygen-carrying chemical in the body's red blood cells, and myoglobin which is a protein in muscle cells. Iron is essential for activating certain enzymes and for making amino acids, collagen, neurotransmitters, and hormones..
It is B. all the other require proteins
I think it’s c let me know if it’s right
Α. Never give a bottle to a crying baby or else the baby will learn to cry every time it is hungry.