Final answer:
1) Syntax. The system of rules for combining words and phrases to form grammatically correct sentences is called syntax. Syntax refers to the order of words in a sentence and how they are organized to create well-formed sentences in a language.
Step-by-step explanation:
The system of rules for combining words and phrases to form grammatically correct sentences is called syntax. Syntax refers to the order of words in a sentence and how they are organized to create well-formed sentences in a language. It is a part of a language's grammar. Semantics, on the other hand, refers to the process of deriving meaning from words and morphemes.