The correct answer is B. Someone's face
Step-by-step explanation:
In the poem presented by Gabriela Mistral, the narrator or author describes the feelings, emotions, and thoughts related to a person. In this the author mainly focuses on the face of the person being described and compares the face to different elements this can be seen in "as smooth as your forehead" or "for me all cruel things end: as gentle as your eyelids". This suggests while the narrator or author speaks, she seems to be looking at someone's face because the poem includes references to different parts of the face.