Plz answer question 9 in the picture... with an explanation

Figure B show element

Explanation:

Element is made up of same type of atoms and in figure b only one type of atom is present

mark him as !

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.