soil erosion is the wearing down of soil this map provides data on the rate of soil erosion in the united states for a given year . what trend does the map show.

i dont know

explanation:

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.

i wish i could but this one is weird give me abc and i can solve it.