A researcher was interested in whether watching violence affected children's behaviors. To examine this, he showed a violent film to one group of preschoolers and a nonviolent film to a second group of preschoolers, and then he observed their aggression levels. In this study, the independent variable was the: A. viewing of the violent film. B. level of aggression displayed before the film. C. level of aggression displayed following the film. D. children's home environment.

A. viewing of the violent film.

Explanation: Independent variables are variables that are not changed by other variables, any changes made to the independent variables affects other variables which are known as the Dependent variables.

In this case the independent variable is the viewing of violent film, independent variables are used in both Mathematical, statistical analysis to effectively analyse treatments or other variables which are to be considered.

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it is a part of john locke's natural rights popular during the age of enlightenment that people had inalienable rights to life, liberty and property. this was reflected by thomas jefferson in his declaration of independence as rights to life,liberty and the pursuit of happiness.

another line in the declaration of independence is that people have certain rights just because they are human. humans are capable of obeying the three natural rights john locke mentioned making them governable by these laws and therefore entitled to these rights as well.