Susan is a 21-month-old who has just begun to make two-word sentences. Her sentences already reveal the grammar of her native language, as she orders her nouns and verbs in the order that mature speakers of her language use. Chomsky would attribute Susan's quick acquisition of grammatical rules to her .

language acquisition device or LAD,

Explanation:language acquisition device or LAD, according to Chomsky this is a hypothetical tool that everyone has it pre installed in their brain which enables them to quickly learn and understand the langauge.

According to Chomsky everyone has an innate langauge abilities which makes them catch on quickly when it comes to all the rules of their langauge. According to Chomsky the theoricaly concept means everyone is born with an ability to understand rules for langauge the only thing they need is to learn the words , once they learn the words it occurs natural to put things appropriately.

line 5 is one of them idk the other one