One which comes from certain foods. But most of it is the sun light. But if lack of vitamin D can cause the cartilage to bone, the adult version but not so much uv. Can cause skin cancer.
One which comes from food, but most of the Black Sun, but if children lack vitamin d can cause cartilage adult section, and see the koprun, but to get the overall UV can cause skin cancer.
One of which came from, but most of the food will be in the sun, but if children mild lack of vitamin D can cause bone and soft, the adult version of the bone, so it is very UV may cause skin cancer.