The immediate cause of World War 1 is the assassination of Archduke Franz Ferdinand of Austria-Hungary.
The Enlightenment promoted the ideas of a belief in progress, and a faith in science. That religion was not the only way to view the world and live. It promoted a more secular outlook.
Answer:
If the 2 objects have the same density, they must have the same mass and volume
They blocked their way to the sea. Hoped this helped.