Question

regional metamorphism is one type of metamorphism and it occurs over
□ large areas, involving tremendous heat and pressure
□ small areas, only involving tremendous heat
□ small areas, involving tremendous heat and pressure
□ large areas, only involving tremendous heat

Explanation:

Regional metamorphism is a geological process. By definition, it occurs over large areas and is driven by both high heat and pressure (from tectonic forces). The first option matches this definition: "large areas, involving tremendous heat and pressure". The other options are incorrect: the second and fourth mention "only heat" (ignoring pressure), and the third and second mention "small areas" (contradicting the "regional" scale).

Answer:

The correct option is: the first checkbox option (the one with "large areas, involving tremendous heat and pressure")