The complete adjective phrase in this sentence is of American literature, and the noun it modifies is study.
Because at the beginning they fell in love then at the end they die together.
The subordinate clause in this sentence is because I forgot to buy milk. The whole sentence is used as an adverb. Adverbs are used to answer questions such as where, when, or in this case, why.
Why did I have root beer in my cereal? Because I forgot to buy milk.
A) wrote
B) cooked
C) dreamt
E) froze
6) arrived
2) met