Question

contact Lenses improve lives. Contact lenses are an example of an __________.

my answer is indepentant variable.

Someone help. it's for a science experiment.
An <B>independent variable</B> is the potential stimulus or cause, usually directly manipulated by the experimenter, so it could also be called a manipulative variable.

A <B>dependent variable</B> is the response or measure of results. What criteria are you going to use to measure life improvement?

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