Question

practice it set of rules governing how symbols in a language are used to form meaningful expressions
arithmetic
vocabulary
grammar
syntax
pragmatic

Explanation:

Syntax refers to the set of rules that govern how symbols (such as words) in a language are combined to form meaningful expressions like sentences. Arithmetic is about numerical calculations, vocabulary is the set of words in a language, grammar is a broader concept including syntax and morphology, and pragmatics deals with language use in context.

Answer:

D. syntax