The Little Mermaid C2 Grammar Odyssey

Identify the sentence with a correctly placed preposition in a non-defining relative clause:

• The sea, that Ariel adores, is full of hidden treasures.
• The sea, in which Ariel keeps her collection, fascinates her.
• The sea, which Ariel keeps her collection in, fascinates her.
• The sea which, Ariel keeps her collection in, fascinates her.

Explanation

In a non-defining relative clause, set off by commas, place the preposition before which: in which Ariel keeps her collection.