Final answer:
The 'Circuit' begins with the narrator's early memories and progresses towards de la Vega's backstory of his life in Guerrero. The juxtaposition of Guerrero's lush jungles against the stark border realities highlights the disparity that drives the narrative.
Step-by-step explanation:
The story 'Circuit' begins with the introduction of the narrator's childhood experiences and swiftly progresses towards the encounter with a man in a churchyard, which sets the stage for future revelations in the narrative. The narrator, tasked with monitoring de la Vega, learns about his origins from Guerrero, where he lived in a village, spoke Mixtec, farmed, and was the father of seven children. This background forms a poignant contrast to the harsh reality of border life and the desperate circumstances that drive people, like those from Michoacan, to seek a different existence. The settings mentioned evoke strong imagery, from the lush jungles of Guerrero to the burning heat of the volcanic earth, painting a picture of the varied landscapes that influence the characters' lives.