Which of these is an example of an energy source that could exist on Europa (or beneath its surface) and help enable life in a Europan ocean? a Volcanoes and/or hydrothermal vents on the seafloor b Solar flares from the Sun that penetrate Europa's ice and send radiation into the liquid-water ocean c Europa's rapid motion as it orbits Jupiter d The combustion of fossils fuels beneath the surface, similar to burning coal in the Earth's crust

Which of these is an example of an energy source that could exist on Europa (or beneath its surface) and help enable life in a Europan ocean? a Volcanoes and/or hydrothermal vents on the seafloor b Solar flares from the Sun that penetrate Europa's ice and send radiation into the liquid-water ocean c Europa's rapid motion as it orbits Jupiter d The combustion of fossils fuels beneath the surface, similar to burning coal in the Earth's crust