Answer:
The technologies that helped increase productivity is system
Answer: Human Services, an associate's degree
Explanation: Taking care of people is human services and a preschool teacher takes care of little people. I googled what you need to become a preschool teacher and an associate's degree is what I saw.
I assume here that we mean the thick, characteristic hair that does not appear in women (since women also have some thin and white facial hair) - this is something that appears only at puberty and it's a physical characteristics.
This is then an example of a secondary sex characteristics - the answer is A).
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