Final answer:
The pronoun 'he' is subjective in this sentence.
Step-by-step explanation:
The correct pronoun for the sentence is he. It is used in the subjective case because it is the subject of the verb 'loves'.
Pronoun cases refer to the different forms that pronouns take depending on their grammatical function in a sentence. In English, there are three main pronoun cases: subjective (nominative), objective, and possessive. Understanding and using the appropriate pronoun case is crucial for maintaining grammatical correctness and ensuring effective communication in writing and speech.