What were four social effects of the California gold rush ?

it was promoted one of the largest migrations in US history.

rapid ecomic growth, buildings of railroads churches Banks.

the expansion of manufacturing service industry.

during the gold Rush California became an economic powerhouse at the end of the century

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.  

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