What's the difference between world war one and world war two?

Which factors make up demographics? check all that apply. age o economies o ethnic groups o governments o income level o religious practices

What happened 10 million years ago? if u answer, u get 50 ! plz answer ; -;

Choose the option that best completes this statement: the british and the continental system were blockades that prevented the united states from trading with without extreme risk to ships, goods, and sailors.