How do the structure differences between a high-mass star and the Sun relate to their convection zones?

Answer

High-mass stars have a convection zone deep inside with a radiative zone closer to the surface.

The internal structure varies by mass; high-mass stars arrange their energy transport zones such that the convection zone is internal, while smaller stars like the Sun have the convective zone nearer the observable surface layer.

How do the structure differences between a high-mass star and the Sun relate to their convection zones?
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