Linked from
The 15 pages that link to Solar dynamo, each with the reason it gives.
Solar magnetic fieldRelated: Differential rotation and convection continually regenerate the field.
SunRelated: Its magnetic cycles drive sunspots, flares, and changes in solar activity.
SunspotNarrower topic: It supplies the magnetic field whose emergence produces sunspots.
HeliophysicsRelated: Its details govern the origin and evolution of the solar cycle.
Hale's lawNarrower topic: Its cyclic magnetic-field production underlies Hale’s polarity pattern.