They were treated poorly because of the same reason the Nazi's treated adult jews; it was because of their heritage. After they were sent into camps, it did not matter how old they were, no one was spared of his wrath.
If you want to know exactly what happened to them with great visuals, I suggest plugging "Children of The Holocaust" into YouTube and finding a great visual explanation to go along with your research.
Most farmers practiced subsistence farming!
B. A condition is just the way that it is and there is nothing to be done about it [I think]
Answer:
Rise of Agriculture
Explanation:
During these times, agriculture became very popular. Therefore in order to manage this, they needed labor. That is why a lot of slaves were transported.