Final answer:
Option b) False
The statement 'Regional metamorphism is most common along divergent margins' is false, as it usually occurs at convergent plate boundaries where pressure and temperature are high enough to cause rock metamorphism.
Step-by-step explanation:
The statement "Regional metamorphism is most common along divergent margins" is false. Regional metamorphism typically occurs in areas with high pressure and temperature conditions, which are more characteristic of convergent plate boundaries.
These boundaries are places where tectonic plates move toward each other, leading to collision, mountain building, and the burial of rocks at great depths.
Conversely, divergent plate boundaries are locations where plates move apart and are associated with lower pressure and temperature conditions compared to convergent margins.
This leads to processes like the formation of new oceanic crust at mid-ocean ridges, rather than the regional metamorphism that transforms large areas of crustal rocks into metamorphic rocks.
In regions of continental collision, such as where the Barrovian sequence of metamorphism is seen, the grade of metamorphism is higher near the center of the collision and decreases further away.
This is because deep, high-grade metamorphic rocks are brought closer to the surface largely due to erosion at uplifting mountain belts.
Divergent boundaries typically feature lower-grade metamorphism, if any at all, and created features like shallow rift valleys and mid-ocean ridges rather than extensive regions of high-grade metamorphosed rocks.