]shari was in the kitchen when she heard a crash. she went into her bedroom and found her window broken and a baseball lying on the ground. shari said "this baseball broke my window.” this statement is an

The above statement is an inference.

Inference is defined as a conclusion based on some evidence and reasoning. In this situation, evidences are the baseball lying on the ground and the broken window. Window is made up of glass which can be easily broken down if hits by a baseball, this can be the reasoning.

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.