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!!!

The freezing point of the ice is lowered because of the rock salt which then allows the ice to observe heat from the ice cream mixture without it melting.