The president has the power to check up on the executive and legislative branch an example would be power of congressional apprehension.This prevents the executive branch from spending over the daily government quota .
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In Mexico the Olmec is considered the first significant civilization who are believed to have lived in the present day Veracruz and Tabasco. Following Olmec was the great Mayan civilization who occupied a large are including southeastern Mexico and Central America. Aztec a well-documented culture also known as Mexica culture. And lastly the Inca or Incan Empire in South America which is probably the largest empire in early 16th century.
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The aim of the study of macroeconomics is to examine the interactions between individual producers and consumers. the behavior of factors affecting the economy. the relationship between supply and demand.