Answer:
The right to speak.
Explanation:
With no other context than just this question, the right to speak is what someone needs to speak in a meeting with other persons.
This is something that is usually earned, the person willing to speak must be a respected individual, someone important within the organization having the meeting, or someone with something important to add to the conversation. Usually, during a business meeting, the only participants are the ones that make decisions, take leadership or have the right to give their opinion.
