Answer:
It's economy droped.
Explanation:
During WWII a lot of money went for weapons, and by the end of it and we entered the Great Depression cause of it.
The steam engine as it was to be used in many machines such as trains, steamboats, factories, farming equipments, etc.
Gridlock, or deadlock, is a situation where there is a difficulty to pass laws that please people and their needs.
Hope it helps!