Alliteration

a figure of speech in which the same sound appears at the beginning of two or more words. Alliterative words are consecutive or close to each other in the text.

Example From Text

Buck wondered where they went, for they never came back; but the fear of the future was strong upon him, and he was glad each time when he was not selected.

Explanation

London repeats the "F" sound in the phrase "fear of the future" to emphasize Buck's anxiety.