Answer: by shared characteristics
Explanation:
Such as appearance and movement.
Iron is a mineral found in every cell of the body. Iron is considered an essential mineral because it is needed to make hemoglobin, a part of blood cells.
<span>They rely on each other for food or resources.
Hope this helps.</span>
Answer:
Of these, there are six main elements that are the fundamental building blocks of life. They are, in order of least to most common: sulfur, phosphorous, oxygen, nitrogen, carbon, and hydrogen.
Explanation: