Answer :
The model that is conceptual is a mental image of types of food organized into a pyramid (option C).
What is a conceptual model?
A conceptual model is the model that is represented by concepts or related concepts formed after a conceptualization process in the mind.
A conceptual model relates to concepts or mental conception i.e. existing in the imagination.
According to this question, the model that is conceptual is the mental image of types of food organized into a pyramid.
Note that; other options are realistic and can be seen.
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