Final answer:
Exploring general purpose is not a good strategy for making an idea bank.
Step-by-step explanation:
Out of the given options, exploring general purpose is not a good strategy for making an idea bank.
Brainstorming is an effective technique for generating ideas, easy-to-research topics can provide a wealth of information, and searching through sources can help you find topic ideas that are relevant and interesting.
However, exploring general purpose does not provide a clear direction or focus for your idea bank. It is important to have a specific topic or area of interest to ensure that your idea bank is cohesive and informative.