Because of , more flexibility in choice of business location has increased while allowing firms to remain competitive.

It seems like you forgot to provide the specific factor or reason in your sentence. However, I can suggest several reasons that might fit:

1. Technological advancements: With the rise of the internet and digital communication tools, businesses are no longer restricted to a physical location. They can operate virtually, reaching customers globally while also sourcing talent from around the world.

2. Globalization: As economies become more interconnected, businesses have more freedom to choose their location based on factors like labor costs, tax benefits, and market access.

3. Improved transportation and logistics: With advancements in transportation and logistics, businesses can easily ship products worldwide, allowing them to be located anywhere while still reaching their customers.

4. Remote work culture: The increasing acceptance of remote work also allows businesses to be located anywhere, as employees can work from home or any other location.

So, your completed sentence could be: "Because of technological advancements, more flexibility in choice of business location has increased while allowing firms to remain competitive."