Answer:
I believe you meant pronoun in the "possessive case."
B. Be careful or your marshmallow might burn.
Explanation:
"Pronouns" have three cases and these are: Subjective, Objective and Possessive.
Possessive case pronouns show "possession." It includes the following pronouns: my, mine, your, yours, his, her, hers, its, our, ours, their, theirs and whose.
The sentence above used the pronoun "your" in the possessive case. It shows that the second person is the owner of the marshmallow.
