Is the dynamo theory or the rapid decay theory more accurate?

The dynamo theory is generally considered more accurate for explaining the generation of Earth's magnetic field, as it describes how the motion of conductive fluids in the outer core creates magnetic fields through the process of electromagnetic induction. In contrast, the rapid decay theory suggests that Earth's magnetic field is diminishing over time due to some unknown mechanism, which lacks substantial evidence and fails to account for the observed stability and reversals of the magnetic field. Overall, the dynamo theory is supported by both observational data and theoretical models, making it the preferred explanation among scientists.