The correct match of the grammatical terms with their definition are
1. clause: a group of words that includes a subject and a verb.
2. convention: a widely accepted usage or way of thinking.
3. phrase: a group of words that make up part of a sentence.
4. syntax: the arrangement of words or phrases in a sentence.
A clause is a group of words that has subject and verb and a phrase is a group of words that is a part of a sentence, but that does not have a meaning alone.
Thus, the correct option is 1- C, 2- A, 3- B, 4- D.
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