Why was it a big deal for children to be in hitler youth?

The Hitler Youth was a logical extension ofHitler’s belief that the future ofNazi Germany was its children. The Hitler Youth was seen as being as important to a child as school was. In the early years of the Nazi government, Hitler had made it clear as to what he expected German children to be like:

“The weak must be chiselled away. I want young men and women who can suffer pain. A young German must be as swift as a greyhound, as tough as leather, and as hard as Krupp’s steel.”

Okay let me see. I am trying to find something

It's most likely choice a, it makes the most sense in my opinion.