weak, small, atrophied. There is an assortment of things it can be called. Please go back in the lesson & search for the specific term.
Answer:
The second line of defense.
Explanation:
The second line of defense, part of the immune system response, is Nonespecific Resistance.
Adoption, and have a serogacy (not sure if that's how you spell it)
Adjust the field boundaries to make distances shorter.
I think it would be the Dance Studio. I'm sorry if I'm wrong.