Which industry has a surplus that contributed to the quiet depression wich lead to a failing economy by the end of 1920s Airplane industry
Farming industry
Automobile industry
Steel industry

Farming industry

Explanation:

The Quiet Depression of the 1920s was a precursor to the Great Depression of the late 1920s when farmers were not enjoying the prosperity that other people were enjoying. This is because they were producing more than they could sell thereby producing a surplus they were not benefiting from.

The farmers of the 1920s had made a killing when they dramatically increased production during the First World War in order to feed the soldiers on the front. With the end of the war, the farmers saw demand for their goods fall. Compounding this were 2 factors;

This saw farmers selling less and the prices of their goods at an all time low due to oversupply thereby hiking their poverty levels in what was called, the Quiet Depression.