What phrase from the passage exposes the author's bias?

What would happend if organ systems failed to work together

In the sentence above, which verb is the irregular verb? a. laid b. warmed c. removed d. walked

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)