A it lends the poem a fairy tale atmosphere
As the name indicates helping verbs are the verbs that help the main verb of the sentence to convey their meaning more effectively or help the main verb to extend their meaning.
Some examples of helping verbs are: is, are, am, can, must, be..
In the given sentence, must is the helping verb, as it is helping our main verb "need" to do convey its function. Really is an adverb and is not a helping verb.
So the correct answer to this question is:
Option A. Must
In other words, he would feel like less of a man in front of his children. (I hope that's right)
The rhyming scheme in the first quatrain of sonnet 130 is ABAB. In the second quatrain is CDCD. In the third quatrain it is EFEF. In the final couplet the rhyming scheme is GG.
Like a house that a child might have constructed from cards.......would be your answer
Hope this helps.