Aircraft - The air force became one of the most important parts of the military during World War II. Whoever had control of the air, often won the battle on the ground. Radar - Radar was a new technology developed right before the war. It used radio waves to detect enemy aircraft.
The War Guilt Clause was added in order to get the French and Belgians to agree to reduce the sum of money that Germany would have to pay to compensate for war damage.
This is an opinion, you cant get it wrong try doing it yourself in your own words. Focus on what the question is asking of you and then do your best to answer accordingly.