In a cooperative, the members may themselves select one of their number to be president, or they may decide to appoint an outsider to chair their meetings.
The speaker
prime minister
vice president
finance minister
No. The Speaker of the House (of Representatives) presides over meetings of the US House of Representatives. The Vice-President of the United States presides over meetings of the US Senate .
Vice President of India who is the Ex-officio Chairman of Rajya Sabha presides the meetings of Rajya Sabha.
union home minister
The President Pro-Tem presides over the Senate when the Vice-President is not there. The Vice-President barely attends Senate meetings anymore.
The "chair" is the person who has been delegated to be in charge, creates agendas for meetings and presides over such meetings as a facilitator to keep the subject matter on topic.
Here's a short answer: any officer who presides at the meetings of an organization.
It is true that the committee chairperson is chosen based on seniority. This is the individual that presides over the meetings that take place within the Senate.
Empress Chinchilla Breeders Cooperative (ECBC) is an organization that hosts shows, seminars, and meetings for chinchilla breeders and pelters.