What is the primary purpose of a main motion?

The primary purpose of a main motion is to bring business before the assembly. This means it is used to introduce a topic or proposal that the group will consider and deliberate upon. Once a main motion is presented, it allows members to discuss, modify, and ultimately decide on the proposed action through a vote. This function is foundational to the operation of meetings, ensuring that members can formally address issues or suggestions within the assembly.

The other choices might relate to aspects of parliamentary procedure but do not capture the essence of what a main motion is intended to do. For example, to amend previous motions pertains to modifying existing proposals, while calling for a vote is a separate action that may occur after discussion. Lastly, adjourning the meeting is a procedural action that signifies the end of a gathering, rather than introducing a new item for discussion. Therefore, bringing business before the assembly is the core function of a main motion.