Which of the following lessons is taught in “the earth only”?

outmoded ideas will come to an end.
the wind and the sun are finite.
the earth will last forever.
the sea and sky will cease someday.

In about two hundred words, explain how the author's use of folktales and symbolism add meaning to the story and convey the central theme of the novel: the disintegration of the traditional igbo society as a result of its contact with european practices and beliefs.