Steven’s Spielberg’s 1975 mоvie Jаws wаs а thriller abоut a great white shark that terrоrized tourists at a local beach. Just before the shark’s appearance, eerie music began to play. As the unseen shark came closer, the tempo of the music picked up. After the audience had experienced this a few times, the sound of the music triggered the emotional reaction of fear in the audience even though the shark still had not appeared. At that point, the sound of the eerie music was a (n):