According to Charles' Law, how does temperature affect the volume of a gas at constant pressure?

Charles' Law states that the volume of a gas is directly proportional to its absolute temperature when pressure is held constant. This means that as the temperature of the gas increases, the kinetic energy of the molecules also increases, causing them to move more rapidly and spread apart. As a result, the volume of the gas expands. Therefore, an increase in temperature leads to an increase in volume, which aligns with the correct answer.

In contrast, the other options suggest incorrect relationships between temperature and volume. For instance, stating that the volume decreases with temperature contradicts the direct proportionality established by Charles' Law. Saying the volume remains constant or describing a scenario where volume and temperature are inversely proportional also misrepresents the fundamental principles of gas behavior defined by this law.