Lying on an air mattress is the way that will increase the gas pressure. The correct option is A.
What is pressure?
The level of force exerted per area is defined as pressure P = F A. To generate a significant amount of pressure, you could either apply a large force, apply a force over a small area, or apply both.
Pressure rises as the number of gas molecules increases while the container volume remains constant.
Gas pressure rises as container volume decreases. When the temperature of a gas in a rigid container rises, so does the pressure.
The gas pressure can be increased by lying on an air mattress, as due to weight the gas particle will get compressed. This increased compression will aid in the increased pressure of gas.
Thus, the correct option is A.
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