As the storm clouds rolled in and the sky darkened, Charlie slumbered on, unaware of the disastrous chain of events to follow. The sentence contains which of the following literary devices?

Symbolism involves using symbols to represent ideas or concepts beyond their literal meaning. While storm clouds can symbolize various themes such as impending danger or emotional turmoil, in this context, the focus is on the predictive nature of the clouds rather than their symbolic meaning. Therefore, this choice does not accurately capture the essence of the sentence.

An allusion is a reference to another work, person, or event, typically to provide deeper meaning or context. The sentence does not reference any external sources or events; it merely depicts a scenario. Thus, this choice is incorrect as it misidentifies the literary device at work.

A flashback is a narrative technique that interrupts the chronological flow of a story to provide background or context to current events. The sentence does not include any retrospective insights or memories, focusing instead on the present moment. Therefore, this choice is also incorrect.