Melted rock collects in a volcanoes what?

Melted rock collects in a volcano's magma chamber. This chamber serves as a reservoir for magma, which is formed from the melting of rocks beneath the Earth's surface. When pressure builds up, the magma can eventually erupt through the surface, resulting in a volcanic eruption. The composition and behavior of the magma can vary, influencing the type of eruption and the characteristics of the volcano.