I don’t know this language so sorry
Answer:
I would first put jaws at number one because most of the other options are for mammals while some marine life has jaws too.
Syntax is also collectively known the arrangement of words in a sentence. The correct answer to your questino is B. For that reason it isn't possible for any other answer in this case to be correct because B actually denotes a rather formal way of how you could talk about syntax.
Answer:
Is this a question about the topic of biology
