Final answer:
Child labor was officially outlawed in the late 19th and early 20th centuries due to the harmful effects on children and activism.
Step-by-step explanation:
Child labor was officially outlawed in many countries during the late 19th and early 20th centuries, including the United States, United Kingdom, and several European nations. In the United States, the Fair Labor Standards Act of 1938 established regulations on child labor, setting minimum age, maximum working hours, and conditions for child workers. The movement to outlaw child labor was driven by growing awareness of the harmful effects of child labor on children's health, education, and development, as well as public pressure and labor activism.
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