Based on the diagram Which process explains why less dense hot magma rises to the surface to displace more sense and cooler magma?

The process that explains why less dense hot magma rises to the surface is called convection. In a magma chamber, hotter magma becomes less dense than the cooler surrounding magma, causing it to rise. As it ascends, it displaces the cooler, denser magma, creating a continuous cycle of movement. This process is driven by differences in temperature and density, leading to the formation of volcanic activity.