When presidents appoint judges to the federal courts, judges go to the bench for a term of "good behavior" which means they can serve essentially for life. describe 2 advantages of having judges on the bench without fear of being removed and 2 disadvantages.

When the president appoints judges to serve in federal courts, they can remain on the bench for how long they wish. According to the "good behavior" principle, the only exception exists if a Congressional impeachment takes place (which is very rare). The lifetime appointment has its pros and cons:

PROS

CONS

One advantage would be that the judges can implement justice based on their own perspective of the law without the influence of public audience, but this has a disadvantage, the candidate is chosen by the president, therefore, the political predisposition of the judge is strongly influenced by the president´s party.  

Another advantage would be that the judges cannot retire in a specific presidential term in hopes of political gain. In other words, the judges would not retire early so they can be replaced by someone with similar political beliefs. On the other hand, this could present a disadvantage, if, by certain reason several positions become available during one presidential term, this would implicate that the Congress might be tilted to the side of the current political party.  

could you give me the options ?