Compared to the south during the civil war, the north had more
large farms.
miles of railroad.
miles of coastline.
experienced military leaders.

The north did have less farms than the south, so that's out, they had about the same amount of coastline, and they both had experienced leaders, so the only viable answer was that the north had more miles of railroad. I hope this helps!

If i’m not mistaken your answer should be the freemen’s bureau started them. i really hope i could ! good luck