option d. Smiling is the correct option.
The baby at the end of the poem is described as smiling.
At the poem's closure, the baby is portrayed as "smiling," suggesting a sense of contentment or joy. This description symbolizes innocence and happiness, reflecting the peaceful and serene nature associated with infants.
The act of smiling embodies a sense of comfort, warmth, and pure delight, evoking a picture of tranquility and happiness. It serves as a poignant conclusion, illustrating the beauty and purity of an infant's demeanor, leaving the reader with a lasting image of joy and innocence within the poem's context.