Final answer:
Geography can interpret the past by showing how the discovery of gold led to significant socio-economic changes and migrations in California, affecting its development.
Step-by-step explanation:
One reasonable application of how geography can be used to interpret the past is to understand how the discovery of gold affected the development of California. This is because the event significantly influenced the human geographic patterns, such as migration and settlement patterns, with the influx of people moving to California during the Gold Rush era. It also determined socio-economic dynamics that shaped the state. Geography, in this sense, acts as a bridge connecting past events with their effects on present conditions by highlighting how geographic features and environmental conditions influenced human activities and cultural developments over time.