What is the function of the relative pronoun in the adjective clause? The essay describes the mountain that I climbed.

A. subject

B. object of a preposition

C. possessive

D. direct object

Hi, the answer would be D - direct object. It cannot be the subject, because the subject of the sentence is "the essay". It isn't object of a preposition, as there is no preposition there. It is not a possessive, and given that this adjectival clause is a part of "the mountain", which is a direct object, it must be a direct object as well.