The elected institution is Parliament.
Members of Parliament are people with a parliamentary mandate. European elections determine who serves in the European Parliament. The elected members discuss and decide on European matters within Parliament’s responsibilities.
Parliament participates in EU legislation and the budget and scrutinises other EU institutions. Its composition therefore matters politically. Nevertheless, electing Parliament is not the same as directly electing every European officeholder.

The other three answers
The incorrect answers name another institution, possible member countries or a legal text.
the European Commission
The European Commission is not directly elected in European elections. The elected Parliament has a role in forming the Commission, but this does not make European elections a direct election of the Commission.
the countries that may join the EU
Which countries may join the EU is not directly decided by a European election ballot. The election determines the members of Parliament, not a new list of member countries.
the European constitution
A constitution is a legal text, not a group of representatives. European elections are parliamentary elections, not a direct vote on a European constitution.
Influence over other institutions is not their direct election.
The European Parliament elects the President of the Commission and votes on the Commission as a whole. European elections can therefore also affect the Commission. The directly elected people nevertheless remain the members of Parliament.
The precise voting method also depends on the rules of the country concerned. This does not mean every individual can be selected directly on every ballot. This question concerns the institution whose members the election determines.
Electing members of Parliament · European Parliament ↗European elections → members → European Parliament.
Learn these three terms together. The Commission, member states and a constitution are different subjects.
Three words for this question
- der Abgeordnete / die Abgeordnetemember of parliament
- A person who serves as an elected representative in a parliament.
- das Mandatmandate
- The role and authority held by an elected representative.
- die Zusammensetzungcomposition
- Who or what makes up a group or institution.
