1.explain briefly how younger people becoming familiar with issues of old age can them in life.

Younger people becoming familiar with issues of old age will help them try to stay healthy, some won't drink or do drugs because of this, others will exercise and eat healthy, and some will do both. teaching young people what happens to old people I think personally will help save their brain cells and their lives.  I hope this helps if you have anything else to add to this question you can put it in the comments and I would be happy to answer it!!!

Yes they should do if insurance denys claim they have a back up to prove why procedure was medically necessary

Hair follicles, blood, etc.