Which practice is the most sustainable? O A. Using paper grocery bags once and then recycling them
B. Using plastic grocery bags once and then recycling them
O C. Using a combination of paper and plastic grocery bags only once
O D. Using cloth grocery bags over and over again

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.

answerto predict;

b.false that your answer