The line from the poem "Friendship" which best conveys the theme that true friendship improves life for humankind because:
- B. "Speaks the language of the heart."
According to the complete text, we can see that the poet writes about true friendship and how it helps to improve life for humankind as love and friendship goes together.
As a result of this, the line which best conveys the theme of true friendship improving life for humankind is the fact that the poet says that true friendship speaks the language of the heart.
Therefore, the correct answer is option B
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