Respuesta :
Student A gave an example of a scientific investigation because it requires a hypothesis prior to the demonstration of his/her experiment.
What is Scientific investigation?
The scientific investigation may be defined as the process which initiates during the process of observation in any experiment. It reveals the methodology, previous outcomes, and some scientific questions based on the specific experiments.
Student A has some hypotheses based on the previous experiments while student B does not have a solid hypothesis because the water level may deviate to a larger extent due to any external factor.
Therefore, it is well described above.
To learn more about Scientific investigations, refer to the link:
https://brainly.com/question/17216882
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