Answer:
A. Now falls on earth to lie
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, <em>fall, snow, and down</em>.
In the last line, rhythms are created in the words, <em>falls, on, earth, and lie</em>. The incorporation of rhythms in poems creates a melodious flow that aids remembrance.