The best theme for all three passages is that it is the intensity of love that gives love power. The correct answer is option B.
The best theme for all three passages, "Young Love," "Heart! We will forget him!" and "How Do I Love Thee? (Sonnet 43)," is B. It is the intensity of love that gives love power.
All three passages approach the theme of love, but in different ways. However, they all explore the idea that love gains its power and significance from its intensity. In "Young Love," the intense emotions of the young lovers are highlighted. In "Heart! We will forget him!", the intensity of the speaker's love for someone she wants to forget is conveyed. In "How Do I Love Thee? (Sonnet 43)," the speaker expresses the depth and intensity of her love for someone.
One line that supports this theme is, "I love thee with a love I seemed to lose with my lost saints." (lines 11-12) This line emphasizes the intense and unique nature of the speaker's love.