Instructions: In this task, you are given a question in English, and your task is to translate it into Persian.
Input: What is the reason behind left hand drive and right hand drive in different countries?
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
دلیل حرکت رانندگی چپ و راست در کشورهای مختلف چیست؟