Can someone explain me what the 5th comment means?

What symbolic aspect did brother vu and mother leave behind? book = inside out and back again

Which statement best explains the function of the subtitlein this text? a. it provides additional information that narrows the focusof the text. b.it draws attention to important information in the table ofcontents. c.it introduces the various sections that appear withineach chapter. d.it explains the author's primary reason for writing aboutthis topic. correct (a)

Select the sentence using an appositive to further explain the subject. the water is cold, but the sand is warm. mr. miller, the dean of the school, makes you feel very humble running in the relay, bob tripped and fell.