Final answer:
The passage detailing Eleanor Roosevelt's efforts during her 1943 Pacific visit is a narrative. It describes the events and actions she took to boost morale among soldiers.
Step-by-step explanation:
The passage about Lady Eleanor Roosevelt's activities in 1943 during her visit to the Pacific theater of World War II is best identified as a narrative mode. This mode is characterized by the telling of a story or a sequence of events, which is evident in the description of Roosevelt's travels, her interactions with the troops and wounded soldiers, and the various activities she engaged in to boost morale. The passage provides details of her itinerary, her speeches, and her personal efforts to communicate with family members of the soldiers, all of which contribute to a storyline that offers insight into her character and the impact of her visits.