Answer and Explanation:
Holden means that he wants children to stop growing up so they don't need to face the adult problems that he has delt with.
"Phoebe points out that Holden has misheard the words—the actual lyric, from the Robert Burns poem, “Coming Thro' the Rye,” is “If a body meet a body coming through the rye” (Sparknotes).
by putting his head down of it
Because it shows evidence to their claim
