In this experiment, what is the control and experimental group? What is the independent and dependent variable

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thanks!In this experiment, what is the control and experimental group? What is the independent and dependent variable
The control in the experiment is the jar with NOTHING added to it. The experimental group is the group of jars with the dead fish, raw meat, and the unknown object in each of them. The independent variable is the type of covering on the jars. The dependent variable is the number of maggots.