In 1895, Wilhelm Rontgen, a German Physicist discovered the x-ray.
The four factors that can be defined as essential parts of one’s overall health are social, mental and emotional, and physical. The answer to your question is C. I hope this is the answer that you are looking for and it comes to your help.
Lack of education about risks
Lunges and breathing is the best
Joints? If this is a real question haha hope it helps