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Which of the following was not a result of early humans increasing proficiency at finding food

Give an example to prove that your society is developed more than it was before 10 years ?

Persons who have not yet attained the legal age of consent under the applicable laws in the jurisdiction in which the research was approved. persons who are under 18 years of age. persons who have not yet attained the legal age of consent under the applicable laws in the jurisdiction in which the research will be conducted. persons who are under 21 years of age.