The author conveys the joy in this excerpt "a group in the back started fanning themselves and singing the song 'heatwave,' making everyone laugh and sing along" through the use of

a) an allusion
b) anaphora
c) a metaphor
d) repetition

A) an allusion

Explanation:

Allusion happens when you make a reference or quote to something or someone. In the case of the phrase shown in the above question, the author conveys joy through the allusion (ie reference) to the song "Heatwave". Allusion is a kind of intertext, where one text relates to another explicitly or implicitly. Thus it is permissible to mention facts, people, works of art, historical events, music, celebrities, already existing in other works.

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