When naming a molecule, how do you indicate that the carbons on either side
of the double bond are pointing in opposite directions?
O
A. Use the number 2 as a prefix.
O
B. Use the prefix trans-
O
C. Use the prefix cis-.
O
D. Use the prefix methyl-.

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.

i think is conclusions.i think so