0.402 l = 402 ml
0.0202 l = 20.2 ml
3.6 l = 360 ml
11.1 l = 11,100 ml

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.

a is the correct answer