I believe the answer is Observations.
Mayan civilizations made architectural designs to use time and days.
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A clan is a group of people united by actual or perceived kinship and descent. Even if lineage details are unknown, clan members may be organized around a founding member or apical ancestor. ... Members may identify with a coat of arms or other symbol to show they are an independent clan.
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The given statement "The entire Senate is up for election at the end every 2 years" cannot be marked as true as every two years about 33 senators come up for reelection not the entire Senate. 
<h3>What is the role of the Congress?</h3>
The United States Congress is the legislature of the federal government of the United States. It consist of two chamber, a lower body is the House of Representatives and an upper body is the Senate.
The role of the Congress is to makes laws that influence the daily lives of the people. It performs the function of hearings to inform the legislative process, conducts investigations to oversee the executive branch, and serves as the voice of the people and the states in the federal government.
Basically, it is considered as the representative of the people and derives its power from the people.
Learn more about Congress here:-
brainly.com/question/4736734
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Russia entered World War One on the side of the Allies against the coalition of Germany and Austria-Hungary (the Central Powers) in 1914. The Russian army performed very badly during the war, suffering several defeats, numerous casualties and losses. There were also famine and production shortages in the country in those convulse years. The people  were desperate and very angry with the tsarist government. TheTsar was forced to abdicate in February 1917, a moderate government took place. In November 1917, the Bolsheviks organized a succesful revolt and took power. Causes? Military distaster, food scarcity and famine, political and social chaos, weakness of the central authorities; all those factores contributed to the Russian Revolution of 1917. 
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1982 Lebanon War and the bombing of Libya in 1986