Who recycle nutrients through an ecosystem? a. producers and decomposers b. producers and consumers c. consumers and decomposers d. producers, consumers, and decomposers

D. Producers im sure of it hope im right

The correct answer is option A which is producers and decomposers.

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.