Which of the following is usually done last in the scientific method of investigation? a. ask a question b. test with an experiment c. analyze data and draw conclusions d. do background research and construct a hypothesis

C. Analyze data and draw conclusions

Explanation:

A scientific method of investigation is a step by step detailed process which involves studying the background and theory associated with the chosen topic of research, observation, forming hypothesis keeping in mind the observation, testing the hypothesis by using experimental procedures, analyzing the data and developing conclusion.  

On the basis of the above description, C is the correct option. The data and conclusion can be drawn after the entire experimental process.

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.

it is the most commonly accepted one