What are two types of transportations that help us stay interconnected and trade between two countries ( please help now)

Which factor was a major cause of the great depression of the 1930?

Which one of these were common aspects of war efforts during world war 1 1. rationing 2. war bonds 3. using schools as military facilities 4. child soldiers 5. women working in factories circle all that apply

Which is an effective question for launching history inquiry related to the cold war