The correct answer is "Poets are capable of effectively capturing and preserving moments of beauty and pleasure in life".
From the beginning, the author is speaking about many of the qualities that all poets share and makes them able to put down their intense subjective experiences onto words in paper. A vivid imagination, capacity to be vulnerable and delicate sensibilities, are all tools they have at their disposal to effectively capture the beauty of life and bring it back to others who might have shared their emotions. Or as the excerpt puts it: "in those who have ever experienced these emotions, the sleeping, the cold, the buried image of the past".
Hope this helps!