Answer :
Answer:
The best hypothesis would be - If missing mineral in the diet is not provided and is needed for the health of rats, the rats will grow weak.
Explanation:
A hypothesis is a possible or suggested explanation for any natural or unexplained phenomenon or occurrence based on the logic and available evidence or observation.
In this experiment, the phenomenon is that minerals are required for the growth of the rats as its explained by the experiment in which rats with normal diet are stronger than the diet with minerals left out. So the best hypothesis would be - if missing mineral which is required for health not provided to the rats, they grow weak.