Which of the following is an example of alliteration?

The example that best illustrates alliteration involves the repetition of the initial consonant sounds in closely placed words. In this case, "Time tells tales of triumph and tragedy" showcases alliteration through the repetition of the 't' sound at the beginning of multiple words—time, tells, tales, triumph, and tragedy. This technique creates a rhythmic quality and enhances the overall aesthetic of the phrase.

The other options, while they may contain alliteration in some form, do not exhibit it as clearly or extensively as the correct choice. For example, "The wind whispered through the trees" has a subtle use of 'w' sounds, but it is not as prominent as in the correct choice. Similarly, "The fog rolled in with a heavy heart" and "Fog fades gently into the night" have more focus on other consonant sounds and do not maintain a consistent repetition of initial sounds as effectively as option C does. Thus, the correct choice distinctly demonstrates alliteration through its deliberate and consistent use of the 't' sound.