The exercise is to decide whether the question accepts the proposed suggestion as a correct answer. If yes, write "True", otherwise write "False".
Question: what is the name of an investigation with controlled variables
Suggestion: Another example might be testing plant fertilizer by giving it to only half the plants in a garden: the plants that receive no fertilizer are the control group, because they establish the baseline level of growth that the fertilizer-treated plants will be compared against.
