What are 2 ways that the pitch is changed on a trumpet?

The pitch on a Trumpet is primarily changed by the length of the instrument's tubing, which can be altered using the valves. When a valve is pressed, it reroutes the air through additional tubing, effectively lowering the pitch. Additionally, the player can adjust pitch by varying their embouchure and air support, which affects the tension and speed of the air being blown into the instrument.