Which of the following statements about idea models is not true?
a.
idea models depict a concept.
b.
idea models are typically used to predict natural disasters.
c.
idea models are typically in the form of a graph or equation.
d.
idea models are used to show the relationship between variables.

The correct answer will be option-B

Explanation:

The models are the simplified representations of any object, complex system and any idea. The model which express the presentation of any idea is known as the ideal model.  

The idea models are the simplified visual representation which could in the form of equation or graphs, 2D and 3D models. These models can depict the complex concepts or systems which could help people understand the complex systems easily. The visual representations show the relationship between the variables.  

Since these models are not used to depict natural disasters, therefore, Option-B is the correct answer.

answer; ///i do believe the answer is (virus);