Can someone help me fill in the blanks.

Why did china build the great wall of china?

What is the focus of article 1 of the constitution? describing the powers and structure of the legislative branch defining bicameral and unicameral houses explaining the veto and override processes reviewing the executive branch of the government

99 points explain the causes and effects of the japanese bombing of pearl harbor in 1941. make sure to explain 3 causes and 3 effect in detail.