Answer:
States
Explanation:
In North America, the most numerous is "States".
There are 3 countries in North America with a total of more than 85 states. These states are spread thus:
Mexico = 32 states
United States of America = 49 states in North America (but has a total of 50 states. Only 49 states are found in North America. The 50th state which is Hawaii is geographically located in Oceania)
Canada = 10 provinces.
............Cyrus...............
I believe it is the second one.
It provided a source of power for many kinds of machines.
The last one the route increased contact with foreign countries
Steam boats allowed trade to be much easier along with transport so going from place to place was much quicker than ever before.