Answer:
C. Concentration of sugar in the water
Explanation:
The independent variable will be the variable that is changing, and the one that influences another variable.
So, in this experiment, the independent variable will be the concentration of sugar in the water.
This is because the groups of flies are given different amounts of sugar in their water, varying from 1, 2, and 3 mg/mL.
This will then impact the average length of the flies.
So, the correct answer is C. Concentration of sugar in the water
