Final answer:
A real estate broker's activity harks back to speculative practices seen before the Great Depression
Step-by-step explanation:
A real estate broker selling several mobile homes on his property is engaging in a business activity that has historical roots in the speculative practices of the past. In the time before the Great Depression, real estate optimism was high due to easy credit and hard-sell techniques, illustrated by the California real estate boom and the ongoing Florida land boom.
Unfortunately, many of these investments led to loss and foreclosure due to overspeculation and external disasters such as hurricanes. Similar techniques have persisted, including blockbusting, which involved exploiting racial tensions to manipulate real estate values. This unethical practice played upon white fears, leading to white flight and allowed speculators to acquire and resell properties at inflated prices to minorities.