Regionalism is the sub-Genre of what larGer Genre?

Because it was destroyed

Realism is the answer.

Explanation:

Regionalism refers to any work in fiction and poetry that pays special attention on the characters, customs, topography, dialect, and other characteristics from a specific region. As it takes elements from the reality (such as languages, places that are generally known, references to pop culture, among many others) it is a sub-genre of realism.