Final answer:
The statement 'Particles in a gas move randomly and rapidly' aligns with the principles of the kinetic-molecular theory which highlights the rapid and random movement of particles in a gas.
Step-by-step explanation:
The statement consistent with the kinetic-molecular theory is: b) Particles in a gas move randomly and rapidly.
According to the kinetic-molecular theory of gases, gas particles are in constant and random motion, covering large distances rapidly.
Since these particles are in constant motion, they frequently collide with each other and with the walls of their container.
These collisions are considered to be elastic, meaning there is no overall loss in kinetic energy. Additionally, the theory suggests that there are no forces of attraction or repulsion between the gas particles, and the actual volume of the gas particles is negligible compared to the space in which they move.
Lastly, the temperature of a gas is a measure of the average kinetic energy of its particles.