Which political system emerged directly from world war 1

What role did imperialism play in world war 2

President of the united states has scheduled a cabinet meeting today to discuss energy policy with specific focus on pollution and global warming. given what you know of the executive branch, which group of attendees would the president most likely expect to provide up-to-date information and expert insight during this meeting?

Why did alexander give the soldier who saved the hat band a reward? why did he then order the man's head cut off?