Answer:
the presence of both an upper and lower chamber of Congress.
Step-by-step explanation:
The bicameral system is a guarantee of pluralism and democracy. Its existence derives from the division of powers itself and the legislative, as the greatest of powers, must be divided. We must not forget that the collective bodies that exercise power are more prone than individuals to abuse them. To entrust the Legislature, therefore, with a single house is to favor the emergence of despotism, much more dangerous in a legislative house.
Based on this concept the US government decided to be based on a bicameral system, to ensure fair legislation and a government committed to the citizens. The bicameral nature of the u.S. Federal legislature is responsible for the presence of both an upper and lower chamber of Congress.