posted by rose .
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 independent variable is the potential stimulus or cause, usually directly manipulated by the experimenter, so it could also be called a manipulative variable.
A dependent variable is the response or measure of results. What criteria are you going to use to measure life improvement?