Answer:
Bicameral
Step-by-step explanation:
Bicameral system was originally created by the English government and United States adopted it after it gained independence from Britain.
In United States Bicameral system divided the house of legislature into two: The senate and the house of representatives. both of them have separate duties.
The duties of the house of legislature is to propose laws that should be passed as legislations. The duties of senate is to cross-examine the proposal and conduct hearing to punish government officials who were accused of misbehaviors.