PLEASE HELP ASAP!!Adding earthworms to a compost pile typically increases the rate at which the organic matter in the pile decomposes. A learner wonders whether adding other organisms to the compost pile will have a similar effect on the rate of decomposition. She decides to answer this question by performing an experiment.

• Formulate a valid hypothesis that the learner could test in her experiment.

• Based on this hypothesis, identify the independent variable and dependent
variables for the learner's experiment.