What activity did electric appliances and other goods marketed in the 1920s fuel?

Why did the german kingdoms unite into one nation of germany?

Ineed with what i should write for my research paper. my topic is history of slavery. 1800 words. all i need is what to write in each paragraphs. like when the research paper has titles for each paragraph and it explains the tile in each paragraph. for example when did slaverh begin? why did it begin like an outline.

Which best describes the impact of the crusades on european exploration?