This question tests the understanding of an organizing metaphor, which is a type of metaphor that is used as a theme and referred to multiple times, building on it with other elements from the same metaphor. The correct answer is B, as it accurately describes an organizing metaphor. Option A is incorrect because an organizing metaphor is used more than once. Option C is incorrect because an organizing metaphor is not limited to describing physical objects. Option D is incorrect because an organizing metaphor supports, not contradicts, the main theme.