How do gases behave according to the laws of pressure and volume?

Gases behave according to the laws of pressure and volume, specifically described by principles such as Boyle's Law and Charles's Law. The correct answer highlights that gases expand and contract based on temperature changes. This behavior is explained by the kinetic molecular theory, which states that as the temperature of a gas increases, the average kinetic energy of the gas molecules increases. This results in more vigorous movement and, consequently, either an increase in volume if the gas is allowed to expand or an increase in pressure if the gas is confined to a constant volume.

Moreover, gases do not have a fixed volume; they occupy the volume of their container, which allows them to expand or compress in response to temperature changes. This adaptability is a defining feature of gases and is essential for understanding their behavior under different conditions.

Other options suggest alternate behaviors that do not align with the fundamental principles governing gas laws. For instance, suggesting that gases remain unaffected by temperature changes contradicts the observed behavior of gases, as temperature directly influences their kinetic energy and overall dynamics. Similarly, the idea of eliminating the need for thermal energy or having a constant volume regardless of temperature does not accurately reflect how gases interact with temperature changes. Hence, the chosen statement correctly encapsulates the fundamental behavior of gases