Then the little girl-daughter put up her little soft brown arms with the beautiful white shell bracelets and said,
'O Eldest Magician! when my father here talked to you
at the Very Beginning, and I leaned upon his shoulder
while the beasts were being taught their plays, one
beast went away naughtily into the Sea before you had
taught him his play.
And the Eldest Magician said, 'How wise are little
children who see and are silent! What was the beast
like?'
And the little girl-daughter said, 'He was round and he
was flat; and his eyes grew upon stalks; and he walked
sideways like this; and he was covered with strong
armour upon his back.'
And the Eldest Magician said, 'How wise are little
children who speak truth! Now I know where Pau
Amma went. Give me the paddle!

Which group of sentences from the excerpt best demonstrates the authors reason for writing ?