The following 3 options are all correct:
Congress makes laws, the President can veto them, and if brought before the Supreme Court, they decide its Constitutionality.
A series of checks and balances, thereby ensuring that no one branch gains too much power.
The President can offer up legislation, Congress can pass it, and the Supreme Court can determine whether it is Constitutional.
Social network analysis is a technique that attempts to "find groups of individuals who cooperate, to find individuals who don't team up yet should, or to find specialists in particular subject areas."
Social network analysis (SNA) is the way toward exploring social structures using systems and chart hypothesis. It describes organized structures as far as nodes (singular on-screen characters, individuals, or things inside the system) and the ties, edges, or connections or collaborations that associate them.
I would say the parliamentary system
The answer would be the third answer