Which line most contributes to the tone of wistful reflection in the last stanza of robert frost’s "the road not taken”?

1. i shall be telling this with a sigh

2.somewhere ages and ages hence:

3.two roads diverged in a wood, and i –

4.i took the one less traveled by,

Baca use comforting imagery. which lines have a more serious tone than the rest of the poem a. when the outside world / no longer cares if you live or die; b. so it is a pot full of yellow corn / to warm your belly in winter, c. remember. / i love you.d. it's all i have to give, / and all anyone needs to live,