Answer:Vitamin B-12
B-complex vitamins
protein
iron
Explanation:meat is a source of protein.proteins are macromolecules of amino acids and it is essential for the functioning of the body of humans thus it is important in the diet.some functions of proteins includes;
The receptors of hormones in cells are proteins. proteins are need for transport of material in body fluids.
The membrane of cells is composed of large amount of protein.
Enzymes needed for the normal function of the body,are proteinous.
Meat is also a source of vitamin and minerals.vitamins are organic compounds which the body needs for it's metabolism,to protect against disease and for growth.
Minerals are essential for cell activities, strong bones and teeth, blood clotting etc