What's the difference between the imparfait and passe compose?
The passe compose is more meant for something that you did in the past like just once or twice. The imparfait is more commonly used for actions in the past that you do on a daily basis such as "je jouais le fut hier."
Though the First World War had a variety of causes, there was one that would directly contribute to the War. State that causes and describe it as best as you can.
The First World War was sparked off with the assassination of Archduke Franz Ferdinand, heir to the Austro-Hungarian Empire. This would set off a month diplomatic exchanges that came to be known as the July Crisis where the Austro-Hungarians demanded that Serbia hand over those involved with the assassination or face war. They would further strengthen this demand when the Germans handed them a "blank check", which meant that Germany would stand by Austria-Hungary's side no matter what happened. Serbia would look to its ally Russia for support and things quickly fell apart as alliances began to take effect with the war beginning with the invasion of Serbia.
Though Europeans had the technological advantage over the Native Americans, what was the weapon that would decimate the Native American population along with opening up the Americas for the Europeans and why?
Diseases such as smallpox and the chicken pox, which Native Americans had never been exposed to before. As such, Native Americans would find themselves quite defenseless against diseases that the Europeans had already build an immunity to.