Question

One of the most important forces that led to the expansion of urban areas is the

O airplane
O automobile
O city bus
0 train

Answer 1

The answer is train. And if not then its automobile.

Step-by-step explanation:

Trains have been the first thing for transportation and for the trade company they helped you get place to place and they went a long way.

-Hope this helps!

- Justin :)

Answer 2

Automobile led to the expansion because it allowed for business to grow.