Which sentence describes a legislative referendum?

voters approve or reject a proposal without the legislature.

a legislature passes a bill that must be approved by voters.

voters approve a measure that is nonbinding and can be ignored.

voters sign a petition to gather support for an issue.

I am pretty sure that the sentence which describes a legislative referendum is being shown in the option : B. A legislature passes a bill that must be approved by voters. I choose this one because the main point is that  legislative referendum allows citizens to approve or reject a particular law which shows that  the option B  is the only correct.Hope it will help you!

Fixing the errors and resubmitting it