The correct answer is D. Syntax
Step-by-step explanation:
In linguistics, the Syntax refers to the general rules and principles that are unique in each language and determine the way phrases or sentences are created. Because of this, the syntax determines the type of words or elements that need to be included and the organization of these, for example in the English language most sentences follow a subject-verb-object organization. This concept differs from semantics because semantics focuses on the meaning of language rather than the structure and it differs from the lexicon because this refers to the words of a language. Therefore, it is syntax the one that provides general principles for organizing words into meaningful sentences.