I'd say the combustion engine, even though it was toyed with in the mid-west during the cowboy era, it wasn't until after the Civil War in which it was a fully effective gasoline powered engine.
Answer:
because they are close to equator
Explanation:
1.) Queen Liliuokalani tried to restore power
2.)The monarch abolished the old religion
3.)The United States annexed Hawaii as territory
4.)Hawaii became the 50th state
It lowered the economy thus causing the great depression
