5. Magnesium, calcium, selenium and zinc are examples of important needed by our body. A. Elements B. Compounds C. Metals D. Nonmetals 6. Seafood's and iodized salts are best source of micro minerals. A. Magnesium B. Calcium C. Sodium D. lodine 7. Copper is to element while is to compound. A. Hydrogen B. Gold C. Sulfur D. Water 8. Deficiency in Zinc (Zn) which is important for the defensive immunity system to work properly can lead to what kind of disease? A. Irregular heartbeat B. Heart disease C. Osteoporosis D. Stunted growth​