The sentence which uses a participial phrase as an adjective is:
<span>A) </span><span>Working
hard is the key for being successful in life. </span>
A participle is a verb which functions as adjective to
modify a noun or pronouns. It can be present or past particles.
Not C; who cares about the author at this point.
Not D; takes too long for an initial feel. Save that for later.
It's a toss up between A or B.
A: The index would provide a more thorough breakdown of words, ideas or interrelated topics.
B: give you chapter outlines; the author could be clever & give the chapters funky names which might not be helpful.
My answer is A.