Considering the available options, the lines from the poem that best develop the theme "people can take charge of their fate" is the "<u>Toiling,—rejoicing,—sorrowing, / Onward through life he goes.”</u>
<h3>What is the theme of a poem?</h3>
The theme of a poem or play is the term used to describe the lesson about life or humanity that the poem conveys to readers.
In this case, the lines "<u>Toiling,—rejoicing,—sorrowing, / Onward through life he goes"</u> expressed the idea that whether one is toiling, rejoicing or in sorrowful mode, one would still have to continue living his life either to maintain the joyful moment, change the sorrow moment or continuing working for better days.
Hence, in this case, it is concluded that the correct answer is option A. "<u>Toiling,—rejoicing,—sorrowing, / Onward through life he goes.”</u>
Learn more about the <u>theme of the poem</u> here: brainly.com/question/13414169