Research for a paper is just like picking a restaurant!
Your assignment gives you the details you need regarding how many and what type of resources (taking different things into account when deciding on a restaurant).
Your topic guides on on where to search (where to find information about the restaurants you're choosing from).
Evaluating resources helps decide if you should move on to another option or stick with what you've got (changing your mind once you've already decided on a restaurant).
Research is just a series of choices.
Think about the way you choose what restaurant to eat at with friends. What type of things do you take into account?
How do you find information about the restaurants you are choosing from?
What might make you change your mind once you've decided?