The correct answer is A. floor crossing.
Floor crossing is the act of a member of a legislature leaving their party to join another party. It is often done for political expediency, such as to gain a position of power or influence. Floor crossing can also be done for ideological reasons, such as when a member believes that their party has become too extreme or corrupt.
Floor crossing is a controversial issue, as it can undermine the stability of a government and lead to a loss of public confidence in the political system. However, it is also a legitimate form of political expression, and it is protected by freedom of speech laws in many countries.
The other options are incorrect.
- B. Fourth estate is a term used to describe the press, as it is seen as a separate and independent branch of government that acts as a watchdog over the other branches.
- C. Fifth column is a term used to describe a group of people who are secretly working to undermine a country from within.
- D. Free ports are ports that are not subject to customs duties or other restrictions.