Answer:
A. Now falls on earth to lie
Step-by-step explanation:
A good look at the poem shows a flow in rhythm that falls and goes up at certain points in the poem. The first option fits into the rhythm created in the poem. A rhyme tends to have a string of words with similar sounds. In the first line, a rhythm is created with the words, fall, snow, and down.
In the last line, rhythms are created in the words, falls, on, earth, and lie. The incorporation of rhythms in poems creates a melodious flow that aids remembrance.