Which term refers to a collective decision by voice?

The term that refers to a collective decision made by voice is "viva voce." This Latin phrase translates to "by live voice" and is often used in parliamentary procedure and meetings where participants express their votes verbally rather than through written ballots. Utilizing viva voce allows for immediate feedback and can be beneficial in situations where a quick decision is necessary, as it facilitates an open discussion and shows the sentiments of the attendees directly.

In contrast, the other terms refer to different voting processes. A secret ballot ensures privacy in voting, allowing individuals to cast their votes without influence or pressure. Consensus vote implies reaching a general agreement among group members, which may involve extensive discussion and negotiation rather than a simple voice vote. Majority rule defines a decision-making process where the option that receives more than half of the votes is accepted, but it does not specifically denote the method of casting those votes, whether by voice or otherwise.