The People
This assumes we are talking about America. It is different in other countries.
The three branches of government (the Executive, Legislative and Judial) all have some form of 'say' when the constitution is being questioned or altered and they are all part of a system of checks and balances to make sure no branch becomes too powerful.
The Legislative branch (the House and Senate) can propose amendments to the constitution which must be voted on and must be passed by both bodies. Most recently, amendments have been about pay for legislators, but some of the past big ones include women's right to vote, prohibition of alcohol and the return of alcohol, and limiting presidents to 2 terms in office.
The Judiciary (ie. the Supreme Court) interpret cases and laws in terms of if they are in line with the Constitution or not (among other things). So a case where a woman is denied the right to vote would be in direct violation of the Constitution and restitution would be made to her. Judicial Activism is when the judges make a landmark decision about a more vague case that changes the way laws are viewed across the country. Brown v. The Board of Education and Roe v. Wade were cases which did not change the Constitution per se, but have left lasting marks on the American legal world by establishing a precedent against which later cases are compared.
The Executive (ie. the President) selects the justices who serve in the Judiciary and can veto bills from the Legislative. He can also propose legislation, including an amendment to the Constitution.
At the end of the day though, the first answer that the people ultimately have the final say in challenges or changes to the Constitution is still somewhat true, because the people elect their representatives to the legislate and executive branches who in turn select the justices for the Judicial branch. If the will of the people is ignored, that politician is unlikely to be re-elected, could be impeached and the people get to choose another representative, ultimately, giving them the people the last word.
Compare and contrast the three branches of the Arizona state government with the three branches of the federal government.
Constitutional limits exist for all three branches of government.
The three branches are executive, legislative, judicial.
The three branches of government are the Executive branch, Legislative branch and the Judicial branch.
The three branches of the Canadian government are the Monarchy and the Executive, Legislative, and Judicial branches.
The Three branches of government are the Legislature, Judicial, and Executive
Spain has the normal three branches of government: Executive, legislative, and judicial branches.
the three branches of government are legislative, judicial, and executive.
The three branches of the U.S. Government are the Legislative (Congress), the Executive (President) and Judicial (Supreme Court)
The three main branches government are executive, legislative, and judicial. Some people say that the states, the people, and the constitution are the other three branches of government.
three, executive,judiviary,and legeslative.
The three branches of the government are the Legislative branch, the Executive branch, and the Judicial branch.There are three branches in the United States government. These branches would be legislative, judicial and executive.