What is the most significant risk for most cancers?

actually, there are a lot of significant risks for most cancers, so to go along with your age, there is also risks such as:

aging, tobacco, being exposed to the sun, radiation, chemicals and other substances like that, some viruses and bacteria, certain hormones, if you have a family history of cancer, of course, alcohol, a bad diet, very little or no physical activity, and being overweight/obese.

~hope i helped ouo have a nice rest of ur day~

lots of love,

 lee

answer; /// i believe that the correct answer is (c); ///when the lungs expand, they fill with air from the atmosphere;

answer; (b) temporal///frontal;