Which gas laws describe relationships among pressure, volume, and temperature?

The correct answer highlights the foundational gas laws that describe the relationships among pressure, volume, and temperature of gases. Boyle's Law states that at constant temperature, the pressure of a gas is inversely proportional to its volume. This principle illustrates how decreasing the volume of a gas leads to an increase in pressure, provided the temperature remains constant.

Charles's Law indicates that at constant pressure, the volume of a gas is directly proportional to its absolute temperature. This illustrates that heating a gas (increasing temperature) causes it to expand and occupy a larger volume.

Gay-Lussac's Law complements these by stating that at constant volume, the pressure of a gas is directly proportional to its absolute temperature. This means that increasing the temperature of a gas while keeping the volume constant will lead to an increase in pressure.

Together, these three laws provide a comprehensive understanding of how pressure, volume, and temperature are interrelated under various conditions, forming the foundation of the ideal gas behavior. Other laws mentioned in the other options do not address all three variables (pressure, volume, and temperature) in the same way.