Answer:-
A control and a variable are key parts of a scientific experiment. A variable is any factor that can change during the experiment. There are different types—independent variables (what you change) and dependent variables (what you measure). A control, on the other hand, is the part of the experiment that stays constant. It helps you compare results and see if the variable you changed actually made a difference. By keeping all other factors the same and changing only one variable, scientists can test cause and effect more accurately. In short, variables change; controls don’t—they help ensure fair testing.
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