Enumeración is a rhetorical device that involves listing a series of items, ideas, or events in a structured manner to emphasize particular aspects or create a vivid picture for the reader. This technique serves to enhance clarity and impact, guiding the audience through various points of interest while adding depth to the narrative. In the context of Hernán Cortés's second letter to King Charles V, enumeration plays a significant role in illustrating the wealth and diversity of the New World, allowing the reader to visualize the grandeur of the lands and people encountered.