Consider the reaction a and b, answer the following questions: For reaction a, which compound is the thermodynamic product: For reactions a, which compound is the slowest generated product from the minor pathway: For reactions b, which compound is the kinetic product: For reactions b, which compound can be generated either from 1,2-addition or 1,4-addition (both the major or minor pathway can be used):

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.