Each of the following lines from "Alone" contain examples of alliteration except

A. "Then something caught: a helping grain of sand."
B. "The car broke free and scuttled smartly right over the road."
C. "A post shot up and cracked—a sharp clang."
D. "I sat back in my seat-belt and saw someone coming."

D. "I sat back in my seat-belt and saw someone coming."

The line from "Alone" that does not contain an example of alliteration is D. "I sat back in my seat-belt and saw someone coming." Alliteration is the repetition of consonant sounds at the beginning of words in a sentence or phrase. In this line, there is no repetition of consonant sounds.

To determine which of the lines from "Alone" contain examples of alliteration, we need to understand what alliteration is. Alliteration is the repetition of initial consonant sounds in a sequence of words. For each line, we will identify if there is a repetition of initial consonant sounds.

A. "Then something caught: a helping grain of sand."
This line does contain alliteration with the repetition of the "c" sound in "caught" and "catch."

B. "The car broke free and scuttled smartly right over the road."
This line also contains alliteration with the repetition of the "s" sound in "scuttled" and "smartly."

C. "A post shot up and cracked—a sharp clang."
This line contains alliteration with the repetition of the "c" sound in "cracked" and "clang."

D. "I sat back in my seat-belt and saw someone coming."
This line does not contain alliteration because there is no significant repetition of initial consonant sounds.

Therefore, the line that does not contain an example of alliteration is D. "I sat back in my seat-belt and saw someone coming."