How is the idea of home represented regionally, locally and globally?

Regionally, a home may be a general region, such as the south. Locally, this will be something on a much smaller scale such as your hometown. Globally, this will usually be a nation as your home.

Example -

My regional home is the south, my local home is Smallville, and my global home is the United States.

Hopefully, this helps! I'm a bit iffy on my answer, but I hope it satisfies you! =)

Yes, the correct answer is b.