WWI and The Post-War Age of Anxiety Academic Help

I’m studying for my History class and need an explanation.

Please look through the websites that include videos, pictures, and articles about WWI.

https://www.history.com/topics/world-war-i

https://www.firstworldwar.com/

Then answer the following questions:

1. What factors led to the outbreak of WWI?

2. Why was it longer, more costly, and more deadly than anticipated?

3. What were the long term consequences of WWI?

Requirements:

MINIMUM 400 words and please use the links that a provided as your refrece.