Answer:
Conduct an experiment.
Explanation:
Any scientific hypothesis or theory requires the proper step and the procedure to explain the particular points about the theory. Any statement made in the science needs the experimental proof.
The scientific experiments includes the different steps used for the validation of any hypothesis. The experiments can explain the main cause of any phenomena and the factors that might affect the experiments. The experimental studies are performed by the scientists.
Thus, the correct answer is option (e).
Flatworm get most of their oxygen through diffusion.
