Acommunity wants to stop pollutants from its farm fields from reaching the river. what should it do? a. use beneficial animals in the farm fields. b. use beneficial insects in the farm fields. c. plant grass in the farm fields. d. plant trees in the farm fields. e. use buffer strips between the farm fields and the river.

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.

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.