What structure characterizes the interior of a very massive star as it ages due to rapid fuel consumption?

Answer

A layered, "onion-skin" structure

The rapid consumption of fuel in massive stars creates a layered, or "onion-skin," structure internally, where subsequent fusion cycles occur in shells around the core.

What structure characterizes the interior of a very massive star as it ages due to rapid fuel consumption?
astronomystarsupernovamasscollapse