"Who has the constitutional right to dismiss the speaker of the House of Representatives?"

Thanks for the question Garnet! Section 35 of the Australian Constitution states the Speaker of the House of Representatives must be a member of the House of Representatives and be chosen by the other members of the House. Therefore, the Speaker can only be dismissed by a vote of all the members of the House. The Speaker can also resign from the position or lose the position if they cease to be a member of the House of Representatives 

diagram to help explain Who has the constitutional right to dismiss the speaker of the House of Representatives?