The option that represents a pull factor explaining rural to urban migration is greater economic opportunity.
Pull factors are positive attributes or benefits of a destination that attract people to move there. In this case, cities often offer more job opportunities, higher wages, better access to services, and overall improved living standards compared to rural areas.
On the other hand, options like religious conflict, natural disaster, and unfair land distribution are generally considered push factors, which create challenging conditions in rural areas prompting people to leave.