What message do you think this image is trying to convey ?

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)

Insert comma today we went to the store to the post office and to the park

How does the author introduces his idea of fish depletion in the first few pages of world without fish?