Because one loves you, helen grey,
is that a reason you should pout,
and like a march wind veer about,
and frown, and say your shrewish say?
don't strain the cord until it snaps,
don't split the sound heart with your wedge,
don't cut your fingers with the edge
of your keen wit; you may, perhaps.

because you're handsome, helen grey,
is that a reason to be proud?
your eyes are bold, your laugh is loud,
your steps go mincing on their way;
but so you miss that modest charm
which is the surest charm of all:
take heed, you yet may trip and fall,
and no man care to stretch his arm.

stoop from your cold height, helen grey,
come down, and take a lowlier place;
come down, to fill it now with grace;
come down you must perforce some day:
for years cannot be kept at bay,
and fading years will make you old;
then in their turn will men seem cold,
when you yourself are nipped and grey.

how does the line in bold suggest a key idea developed in the poem?
it compares real qualities with superficial ones.
it confirms that helen is attractive.
it implies beauty is nothing to celebrate.
it suggests pride should be based on other things.

answer; /// i do believe the correct answer is (c) public education;

1. the relationship between a pronoun and its antecedent- reference

reference refers to the relationship between mainly pronoun and another unit of grammar- noun phrase or noun.

2. a singular noun naming a collection or group- collective noun.

collective noun refers to the kind of noun which refer to the name of people, thing or anything in collective. for instance bundle of sticks, herein 'bundle' is collective noun.  

3. a modifying clause whose subject and/or verb is implied- elliptical clause

it is a clause in which words are being left out. on the other hand, the missing word is understood due to the logic or pattern of the sentence.  

4. two or more nouns and/or pronouns serving the same grammatical function and followed by a pronoun that references one or all nouns- compound antecedent

compound antecedent refers to which is made up of two or more words which are joined by 'or' or 'and.'

5. an adjective clause introduced by a pronoun- relative clause.

relative clauses are the clauses which begin with the relative pronouns such as when, where, which, that or who. the noun that precedes, relative pronouns identify or define that noun.  

6. the word, phrase, or clause to which a pronoun refers- antecedent.

antecedents refers to the phrases, clauses or words which are replaced with one of the third personal pronouns.