If seated in the back of a large auditorium and you cannot hear the speaker in front what aspect of sound needs to be altered to remedy the situation?

In this scenario, the volume level of the speaker's voice needs to be increased to reach the back of the auditorium. Additionally, using microphones and a sound system can help amplify the speaker's voice and make it clearer for those seated at a distance. Adjusting the acoustics of the room, such as using sound-absorbing materials or minimizing echo, can also improve the clarity of the sound.