You should begin by gathering textual evidence. With the textual evidence, you will be able to provide quotes that will help support your analysis.
When the two comets collided, it was a moment of impact.
The students had a moment of impact in the hallway when they ran into each other.
The correct answer is - B. It is a possessive pronoun that takes the place of a noun.
Let's go through all of these options first.
A - there are no prepositions in this sentence, so 'yours' cannot be the object of a preposition.
C - the subject of this sentence is the pronoun 'I' because it is the doer of the action
D - it is not a personal pronoun; personal pronouns are I, you, he/she/it, we, you, and they.
Therefore, the correct answer is only B - it is a possessive pronoun because it shows that the pronoun 'you' is the owner of the skateboard that the subject likes more.