Which area of the moon is partially molten?

The area of the Moon that is partially molten is primarily found in the lunar mantle beneath the surface, particularly in regions associated with the large impact basins, such as the South Pole-Aitken Basin. This partially molten zone is thought to be a result of heat produced by radioactive decay and residual heat from the Moon's formation. Additionally, some recent studies suggest that the presence of water ice and other volatiles may influence these partially molten areas, particularly at the poles.