What? Do you have a question?
Women generally produce 3-4% less melanin in their skin than do men in all populations of the world. They suggest that this is probably due to the fact that women have far higher calcium requirements during their reproductive years. They may suffer from more pimples, or skin irritations.
That would be a graph. Graphs are used to present calculations, basically anything that is numerical can be represented on a graph.
Yo could use Freytag's Pyramid.
