Final answer:
The behavior of the gases will change by having the gas particles hitting the walls of the piston chamber more frequently, which will result in increased pressure within the chamber.
Step-by-step explanation:
When more pressure is applied to a piston in a piston chamber, which contains gas, the behavior of the gas will change in a specific way. According to the principles of gas behavior under pressure, applying more pressure to the piston will decrease the volume that the gas particles have to move around. This decrease in volume has two effects: the gas particles will hit the walls of the container more frequently, and the pressure within the container will increase.
Each individual collision exerts a force on the walls of the container. With the gas particles having less room to move due to the increased pressure, the frequency of these collisions will increase. This, in turn, results in a greater pressure exerted against the container walls. This concept is related to Boyle's law, which states that at a constant temperature, the pressure of a gas is inversely proportional to its volume. Therefore, compressing the gas by applying more pressure will lead to more frequent particle collisions, which is choice D in the student's question.