In which underlined adjective clause is the relative pronoun used as the object of a preposition? i saw a dog whose sled left without him. the part of alaska that is within the arctic circle is cold most of the year. the explorer whom i met last year has never been to the north pole. the climate is one in which little foliage can grow.

D) The climate is one in which little foliage can grow.

Explanation: A relative pronoun is a type of pronoun that often introduces dependent clauses in sentences. The relative pronouns are: who, whoever, whom, whomever, that, which, when, where, and whose. The object of a preposition is a noun, noun phrase, or pronoun that follows a preposition and completes its meaning. From the given sentences, the one that has a relative pronoun as the object of a preposition is option D: "The climate is one in which little foliage can grow" the relative pronoun is "which" and it is part of the object of the preposition "in."