Final answer:
The personal pronoun for the sentence 'They gave us the directions to find the treasure' is 'd. They', which is a subjective case pronoun serving as the subject. 'Us' is an objective case pronoun and is the object of the verb 'gave'.
Step-by-step explanation:
The personal pronoun for the sentence 'They gave us the directions to find the treasure' is d. They. In English grammar, personal pronouns are used to substitute nouns that represent people or things. The pronoun 'They' is a subjective case pronoun which functions as the subject of the sentence.
In contrast, 'us' in this sentence is not a subjective pronoun but an objective case pronoun, and it functions as the object of the verb 'gave'. Subjective case pronouns include I, we, you, he, she, it, they, and who. These are utilized when the pronoun is the one doing the action of the verb. Objective case pronouns like me, us, him, her, them, and whom, are used when the pronoun is receiving the action of the verb.
Another type of pronoun is the possessive case pronoun, such as my, ours, your, his, her, and theirs, which express ownership. The words 'their', 'there', and 'they're' are often confused in English, but they are quite distinct. 'Their' is a possessive pronoun, 'there' indicates place, and 'they're' is a contraction of 'they are'.