The diagrams above use arrows to represent the speed of a gas particle. Which of the diagrams best represents the speed of the particles of a gas at a fixed temperature, and why?

answer choices
Diagram 1, because all the particles have the same speed.
Diagram 1, because the particles are moving in different directions.
Diagram 2, because the particles have a net kinetic energy of zero.
Diagram 2, because the particles have a variety of different speeds