Which of the following keep businesses in check? labor unions industrailzation immigrant workers women and children

Labor unions.

Explanation:

Labor unions or trade unions originated in the UK during the 18th century due to the rapid industrial expansion and the extremely poor labor conditions that workers were forced to endure. Ever since, labor unions keep businesses controlled by securing, through collective bargaining, acceptable labor conditions and wages for the workers, always aiming at improving the living and existential conditions of the workers.  

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explanation:

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the award is named for an american naval historian and theorist, rear admiral alfred thayer mahan, united states navy who, through his writing, provided stimulus and guidance to those who share in the defense of the nation.