Who decides whether a child goes to kindergarten in Germany?

EDITORIAL LEARNING AID

Why is this answer correct?

Attending kindergarten in Germany is voluntary; the parents decide as legal guardians, supported by Article 6 paragraph 2 of the Basic Law. The state and the federal states fund and regulate kindergartens but do not decide in individual cases, and schools are responsible for older children.

Kindergarten: parents decide, the federal states regulate.

This translation and explanation are editorial learning aids. The official German wording and answer key govern the examination.