Answer:
It helps you figure out what you want to investigate and how.
Step-by-step explanation:
In the world of academic writing, or for that matter, any form of writing a research paper, it is pertinent to have a plan at first. This planning will ensure the proper process of taking things into consideration, what to do, how to do, what should be the main point of focus, and all.
The very purpose of planning any research is to make sure that the main points that are to constitute the investigation are well thought of. This will ensure there are enough and valid resources to take the investigation further, and that due process is followed. It will also help the people or person involved to figure out the how, when, why, and what of the investigation that is to be done.
Thus, the correct answer is the first option.