The process by which metabolic waste is eliminated from an organism.
D) oxygen, carbon dioxide when you breathe in, you take in oxygen and when you breath out, you release carbon dioxide.
Answer: Calcium: not enough calcium can lead to rickets, osteopenia and osteoporosis. Iodine: not enough iodine can cause goitre and other conditions like intellectual disability. Iron: children are at higher risk of iron deficiency than adults, mainly because children need more iron when they go through growth spurts
Explanation:
