When correcting a dangling modifier, what is a good question to ask?

Suppose you need to verify how correctly use commas you open ur english textbook and scan the chaper titles in which one would most likey find the information you need

Which component is necessary to create an effective and debatable thesis statement

Which sentence has the correct subject-verb agreement? most storms occurs at this time of year due to weather patterns. most storms occur at this time of year due to weather patterns.