Answer:
let me think of one alright
Not happy child because not happy is the same as unhappy
Listening is more involved and emotional
It has something to do with the book I would guess just read it
Salamanders can regrow entire limbs and regenerate parts of major organs, an ability that relies on their immune systems, research now shows. ... They then wiped out some or all of the macrophage cells to determine whether these cells were essential for regrowing the limbs.