How does the shape of a molecule affect its function? A. The shape of a molecule determines how gravity affects it.
B. The shape of a molecule determines its properties and
interactions.
C. The shape of a molecule determines what kinds of atoms it
contains.
D. The shape of a molecule determines its molecular weight.

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

the answer to your question is c