Answer:
The probable hypothesis would be - If a bottle having less water in it, then the note played is lower due to the presence of the more air to move around.
Explanation:
The hypothesis is an idea that is able to explain some problems with prior knowledge or experiments but it is not able to prove it. The hypothesis is not just a guess or it is also not a well-sustained explanation it is in between.
In this experiment, a hypothesis can be formed on the base of the water quantity present in the bottle as we already know the more air present in some instrument or in a medium the lower the sound it will produce.
Thus, the correct answer would be - If a bottle having less water in it, then the note played is lower due to the presence of the more air to move around.
