In sociolinguistics, an accent is a manner of pronunciation that is unique to a certain location.
What are some examples of an accent?
Accents typically are different in voice quality, and pronunciation.
Are the people speaking the same language? Can they understand each other?
Yes, accents are often a subset of dialect so they are variations on similar dialects.
What is a dialect?
A dialect is a distinct localized version of language.
Does that have to do with geography?