Answer:
The answer should be: Companies replaced hand-operated brakes with air brakes on trains.
Explanation:
You have to think how hard it was for trains to stop with hand operated brakes. Trains go fast, and not stopping in time can be dangerous. Hope this helped :)
Answer:
It lowered the cost of shipping produce from farms to cities
/ Easier to move produce to other areas
Explanation:
Good to know. Not sure if this is a question or not.