The start of the great depression is usullly pegged to the stock market crash of black tuesday on october 29, 1929 when the dow jones industrial average fell almost 23 percent and the market lost between 8 billion and 9 billion in value which is likely a reason this information is from a secondary source

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.