Answer: B. Lungs
Explanation:
The lungs are the only organ in the body that can float on water.
The average adult needs 1,000 mg of calcium per day in the body.
<h3>What is Calcium?</h3>
This is a chemical element with the symbol Ca and atomic number 20. It is involved in the strengthening of bones and teeth in the body so as to reduce risk of fracture.
Average adults require 1,000 mg of calcium per day for optimal functioning of body cells.
Read more about Calcium here brainly.com/question/103896
False oldest living tree is in California the lineup Longeva
One way to remove dirt and harmful substances from water is by filtering.