Bürgerschaft is the name used here for the state parliament.
A state parliament passes laws and scrutinises the government. In Bremen this elected body is called the Bürgerschaft, while the state government is the Senate. A parliamentary election and a Senate meeting are therefore different events. Four describes the parliament’s electoral term.
An electoral term contains many plenary sittings, committee meetings and votes. No individual sitting lasts four years. The longer time span describes the period during which elected representatives carry out their parliamentary work.
The other three answers
This question follows Bremen’s constitutional rule, not a general guess about elections.
3
Three years is not the normal term. The possibility of early termination does not turn the basic rule into a three-year term.
5
Five years is not the rule for Bremen’s Bürgerschaft. Do not transfer the five-year terms of other state parliaments to this question.
6
Six years exceeds the specified normal duration. Article 75 states four years, not six.
Four years is the rule; an earlier election remains possible.
Article 76 permits early termination by a parliamentary resolution or a referendum under specified conditions. A parliamentary resolution requires at least two-thirds of the members to agree. The detailed procedure goes beyond the simple test answer.
After early termination, a new election must take place no later than the Sunday or public holiday following the seventieth day after the decision. A regular election normally takes place in the last month of the current term. This page explains the rules without predicting a future election date.
Articles 75–76 · Electoral term · Constitution of Bremen ↗Bremen → Bürgerschaft → four years.
The Senate is the government; the Bürgerschaft is the elected parliament.
Three words for this question
- die BürgerschaftBremen’s parliament
- Here, the elected representative body at state level.
- die Wahlperiodeelectoral term
- The normal period for which representatives are elected.
- die vorzeitige Beendigungearly termination
- The end of an electoral term before its normal duration has elapsed.