Syntax is a branch of linguistics that focuses on the rules governing the structure of sentences and phrases in a language. It deals with the arrangement of words and phrases to form meaningful and grammatically correct sentences. Syntax examines the relationships between different parts of a sentence, such as subject, verb, object, and modifiers, and how they combine to create complex linguistic structures. Researchers in syntax study the principles and patterns that underlie sentence formation and analyze how these rules vary across different languages. Syntax is an essential aspect of understanding the rules and constraints that govern language use and production.