Plate tectonic systems in ice can maintain redox disequilibria.
Lithic plate tectonics are required to maintain redox gradients over long time periods.
Magnetic fields are required to maintain habitable environments.
Only bodies within a star’s habitable zone can host life.
Chondritic planetary compositions provide the required elemental abundance for abiogenesis
Other ocean worlds have ongoing rock-water interactions, akin to seafloor hydrothermal or terrestrial serpentinizing systems, where life may have begun on Earth.
Life on Earth began in the ocean, via serpentinizing or hydrothermal systems.
Life began in surface geothermal pools.