Answer: A. "then something caught: a helping grain of sand."
Step-by-step explanation: alliteration is a literary device that consists in the repetition of the sounds at the beginning of consecutive words, or words that are close to each other in a sentence or paragraph. In the given options, we can see examples of alliteration, in option B the sound "s" repeats in the words "scutterd" and "smartly" and also the sound "r" repeats in "right" and "road". In the option C, we have alliteration in the words "cracked" and "clang." In the option D, the sounds repeat in the words "sat" "seat-belt" "saw" and "someone." Option A doesn't contain an example of alliteration.