Which of the following is a limitation of models?

Models usually do not have exactly the same features as the objects or events that they represent.

It is often easier to study models rather than the objects or events that they represent.

Sometimes models provide data when data cannot be acquired from natural objects or events.
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Models are often safer to study than the objects or events that they represent.

Models are simplified representations of objects or events, they do not possess all the features and complexities of the actual object or event. This can limit the accuracy or completeness of the information obtained from studying the model. Therefore, the first option "Models usually do not have exactly the same features as the objects or events that they represent" is a limitation of models.