How do Composers Create Tension in their Music?

One way that composers can create tension in their music is by adding a crescendo in their piece right before a sudden stop. This makes the climax in the piece begin and then it stops. The listener starts to ask them self what is going to happen next? Is it gonna end happy or sad? The crescendo signifies the beginning of the climax and the sudden stop is a time where the composer gives time for the listener to ask questions. The composer could then give the reader and answer by composing a nasty sound for a sad ending or a nice sound for a happy ending. The good part about a void in a piece is that it gets the listener hooked and wanting to hear more so that he can be relieved from all the tension created because of the void.