The correct answer is option 1: The Parliament. The salary of Members of Parliament (MPs) is decided by the Parliament itself. It is a decision made collectively by the Members of Parliament through legislative processes. This means that MPs themselves have the authority to determine their own salary and any changes to it. The Parliament, which is made up of elected representatives, has the power to set their own remuneration based on various factors such as economic conditions, inflation rates, and standard of living. This allows MPs to have control over their own financial compensation. It is important to note that in some countries, an independent body may also be involved in making recommendations or deciding the salary structure, but ultimately it is the Parliament that has the final say.