To determine which excerpt from "A Story of the Red Cross" best reflects what is occurring in the frame from "One War Ends, Another Begins," we would need to consider the themes and events captured in that specific frame.
If the frame depicts scenes of destruction, despair, and the aftermath of conflict or disaster, then the following excerpt would likely resonate the most:
"The strongest buildings, half standing, roofless and tottering, told what once had been the make-up of a thriving city."
This excerpt vividly describes the devastation of a once-thriving city, emphasizing the destruction and the impact of war or disaster, making it a strong match for scenes highlighting the aftermath of conflict.