Question

Which punctuation serves to set dialogue apart from the rest of the text in a narrative?

Answer 1

Answer:

Quotation marks and commas.

Explanation:

In general, most dialogues are made of two parts:  first, the spoken portion of the sentence, which represents the dialogue, and second, the speaker, identified by the dialogue tag.  

In order to separate these two parts, the dialogue and the speaker, a comma is commonly used.

Bearing the above in mind it could be said that punctuations that serve to set dialogue apart from the rest of the text in a narrative are quotation marks and commas.

Answer 2

Quotation marks. Hopes this helps