Answer;
-Independent variable
Explanation;
-An independent variable is defines as the variable that is changed or controlled in a scientific experiment. An independent is changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent variable on the other hand, is the variable being tested and measured in a scientific experiment.
-A change in the independent variable directly causes a change in the dependent variable.The independent and dependent variables may be viewed in terms of cause and effect