How does carbon from corn end up in human hair?

So if we eat a particular kind of food, and it has a particular kind of carbon in it, that's recorded in us, in our tissues, in our hair, in our fingernails, in the muscles

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.

the sun creates it's own light, also gives light and life to bunch of stuff like plants,animals,humans etc.photosyntesis is the process of making food which needs sun,water,nutrients etc.