What of the following correctly explains how these differences cause the air masses to move?

Differences in temperature and pressure between air masses create gradients that drive their movement. Warm air is less dense and tends to rise, while cooler air is denser and sinks, leading to convection currents. Additionally, high-pressure areas push air towards low-pressure areas, resulting in wind patterns that facilitate the movement of air masses. These interactions ultimately influence weather patterns and climate dynamics.