One limitation of Armando’s model is that all the water enters the model from one source: the water tank. Explain why this is a limitation of the model.

No other source of water is used for this model.

Explanation:

All the water enters the Armando’s model from only one source and that source is the water tank. This is considered as a limitation of the Armando’s model because only water tank source is used in this model and no other source is compatible with this model so that's why this water source is considered as limitation of this Armando’s model.

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