Guardianship (noun)

1. The position or function of a guardian.
2. The action or power of guarding someone or something.
3. The responsibility for the care and protection of someone or something.

Origin:

Late 16th century: from guardian + -ship.

Examples:

1. The grandparents were granted guardianship of their granddaughter after her parents passed away.
2. She was appointed as the guardian of her younger siblings after their parents' death.
3. The guardianship of the national park was transferred from the state to the federal government.
4. The guardianship of the historic site was entrusted to a local preservation society.
5. The court awarded guardianship of the children to their aunt and uncle due to their parents' inability to care for them.