14) Write short note on: i) Chemistry of plaster of paris.
ii) Carbon reduction process and Froth floatation process.​

by cartels in other countries, shipped by air, mail, or land. i cant really see your answer choices : /

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.