By 1914, which european nation had the most powerful navy?
a. russia
b. france
c. germany
d. great britain

The most powerful navy at the time was owned by Great Britain - D.

The reason why they owned the biggest navy was complex. First, it was because they were more or less a naval power. They mostly rellied on ships to expand their empire (They were an island nation). Another thing was that they had vast colonies and in order to maintain peace in those, they needed a good and efficient navy. 

They mowt likely lived in caves or maybe rock houses,i know they are similar but its all i know