Identifying the Purpose of Narrative Techniques in Literature

In a detailed analysis of modern literature, the author discusses various narrative techniques used by contemporary authors to engage readers:

'One notable trend is the use of non-linear storylines, which serve not just to surprise the audience, but also to create a deeper emotional connection by revealing character backgrounds in a fragmented manner. Alternatively, the use of unreliable narrators can lead to intriguing dynamics where the reader must carefully discern the truth, fostering a more active reading experience. Such strategies highlight the evolving nature of storytelling, challenging traditional forms.'

The passage primarily focuses on which of the following functions?