a. Helen is frustrated by the challenges associated with learning to communicate.
Are there answer options?
Magma rises through cracks or weaknesses in the Earth's crust. When this pressure is released, eg as a result of plate movement, magma explodes to the surface causing a volcanic eruption<span>. </span>
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.