Question

What’s the regions ?

Answer 1

Answer:

In Geography, regions are areas that are broadly divided by physical characteristics, human impact characteristics, and the interaction of humanity and the environment. Sorry didn't realize it was for math

Answer 2

Answer:

In mathematical analysis, the word region usually refers to a subset of or that is open (in the standard Euclidean topology), connected and non-empty. A closed region is sometimes defined to be the closure of a region. Regions and closed regions are often used as domains of functions or differential equations.

Step-by-step explanation:

(I got this from the internet.)