Syntax Theory is a branch of linguistics that studies the structure of sentences in a language. It focuses on how words combine to form phrases and sentences, examining rules that govern sentence formation. This theory helps linguists understand the grammatical relationships between words and how meaning is constructed. One of the key concepts in Syntax Theory is the idea of syntactic categories, such as nouns, verbs, and adjectives. These categories play a crucial role in determining how words can be arranged in a sentence. By analyzing these structures, researchers can gain insights into the underlying principles that govern language use across different cultures and languages.