Answer:
Lines 22 through 30 describe the speaker's memory of a previous experience where she witnessed a rainstorm in a desert.These lines contribute to the plot of the poem by adding a deeper layer of meaning to the speaker's desire for rain in the present moment. First, the lines establish that the speaker has experienced rain in the desert before, which implies that she knows the beauty and power of such an event. This helps to explain why she is so eager for it to rain again.Second, the lines use vivid imagery to convey the transformative effect that rain can have on a barren landscape. The lines describe how the rain transformed the desert "into a pool of turquoise," and how the speaker and her companion were "enchanted." This image of transformation helps to underscore the speaker's desire for rain in the present moment, as she longs for the same kind of transformation in her current surroundings.Overall, lines 22 through 30 contribute to the plot of "Rain Check" by deepening the reader's understanding of the speaker's desire for rain and the significance of such an event in the desert landscape.