Read the excerpt from Enrique’s Journey. The train passes into northern Chiapas . Enrique sees men with hoes tending their corn and women inside their kitchens patting tortillas into shape. Cowboys ride past and smile. Fieldworkers wave their machetes and cheer the migrants on: " Qué bueno! " Mountains draw closer . Plantain fields soften into cow pastures . Enrique’s train slows to a crawl. Monarch butterflies flutter alongside, overtaking his car . How do the underlined phrases support the author’s purpose?