Element found in only 1% of living bodies:

Explanation

The correct answer is phosphorus. Phosphorus accounts for about 1% of the human body and plays a crucial role in forming bones, DNA, and ATP, which is vital for energy transfer in cells. On the other hand, oxygen, carbon, and nitrogen are found in much higher concentrations. Oxygen accounts for about 65% of the human body mass, mainly as part of water. Carbon makes up about 18%, serving as the backbone for organic molecules. Nitrogen accounts for about 3% and is essential for proteins and nucleic acids. Therefore, among these options, phosphorus is the element found in about 1% of the human body.