"التي" is a relative pronoun in Arabic, used to refer to feminine nouns. It connects clauses by introducing additional information about a noun, similar to "that" or "which" in English. For example, in the phrase "المرأة التي تدرس" (the woman who studies), "التي" links the woman to her action of studying. In Arabic grammar, "التي" is essential for creating complex sentences. It helps clarify relationships between different parts of a sentence, enhancing understanding. This pronoun is often used in literature, everyday conversation, and formal writing to provide more context about a subject, such as الأفكار or الأحداث.