What does grammar provide in relation to syntax?

Grammar serves as a comprehensive framework that lays out a set of rules for how words can be arranged to form coherent and meaningful sentences, which is central to syntax. Syntax refers specifically to the arrangement of words and phrases to create well-formed sentences. The rules of grammar govern this process, ensuring that the structure adheres to standard language conventions, allowing for effective communication and comprehension among speakers.

While other options like recommendations for pronunciation, guidelines for word construction, and definitions of word meaning are certainly important aspects of language, they do not specifically address the relationship between grammar and syntax. Pronunciation relates to how words are spoken, word construction pertains to morphemes and the formation of words, and definitions focus on the meaning of individual words, none of which directly contribute to syntactic structure in the way that grammar does. Thus, the correct choice highlights the essential role of grammar in defining how we construct and understand sentence structure.