The bond between iodine and fluorine in l-F would be a: O
a
Ob
ес
james bond
nonpolar covalent bond
ionic bond
o d
polar covalent bond

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.