Answer:
A.) buying Alaska from russia in 1876
Explanation:
The main cause was the assassination of Franz Ferdinand who was the archduke of Austria. He was assassinated by Gavriollo Princip who was Austrian - Hungarian. Those two countries were constantly in conflict because Hungary wanted to separate and once those countries went into war over the assassination their allies had to join being the rest of Europe. <span />
Bedrock structure is primarily responsible for landscape differences.
Bedrock lies beneath the surface materials such as soil,
gravel, sand and other sediments. It is a deposit of hard, consolidated,
tightly-bound solid rock. It is the parent material for unconsolidated material
and soil above thus influencing landscapes.
