Final answer:
An original main motion is a formal proposal that initiates discussion or action, while an incidental main motion addresses immediate questions concerning the business at hand and must be resolved before moving forward.
Step-by-step explanation:
The difference between an original main motion and an incidental main motion lies in their purpose and timing during a meeting or deliberative assembly.
An original main motion is a formal proposal put forward for the assembly to take certain action or a stance on an issue. This type of motion is the starting point for most discussions and business within a parliamentary procedure.
On the other hand, an incidental main motion arises as a result of or in connection with the business at hand. This type of motion pertains to questions that require immediate attention and must be decided before business can proceed. Examples include motions to suspend the rules, divide a question, or consider a question out of its planned order.