Final answer:
In 'The Little Mermaid,' Sebastian suggests that Ariel needs a guardian for supervision.
Step-by-step explanation:
In the story 'The Little Mermaid,' Sebastian suggests that Ariel needs a guardian in terms of supervision. A guardian is a person who has the legal responsibility to take care of someone, usually a child, and ensure their well-being and safety. Sebastian recognizes that Ariel, being a young and curious mermaid, needs someone to oversee her activities and provide guidance.