Answer:
After he has finished gathering notes for his research project, Holden should decide which structure he is going to use in the report because it can vary depending on the topic, which in this case is about how steel is made. After he decides how the report is going to be, he should start writing the report with the information he gathered and in case he needs more information he should continue doing research.
Step-by-step explanation:
To complete this exercise, you have to write the next step Holden has to do to write his report on how steel is made. It is important to gather the information first because, although you can still do research after you start writing if you need more information, it allows you to decide how you are going to write the report and then you can start writing.