Final answer:
An initiative in direct democracy is a process where citizens propose and vote on legislation themselves, mentioning the proposed law or amendment on the ballot after a rigorous legal review and signature collection. The correct option is A) Citizens proposing and voting on legislation.
Step-by-step explanation:
The form of direct democracy known as an initiative is best described as Citizens proposing and voting on legislation. An initiative is a process through which citizens can bypass the legislature by directly proposing legislation themselves. They gather signatures to put a proposed law or constitutional amendment on the ballot for a public vote. The process for passing an initiative can be rigorous and typically includes filing the proposed initiative with the state for legal review, and possibly an assessment of the cost of implementation by state officials. If these hurdles are cleared, the initiative is then placed on the ballot for a vote during an election.