Final answer:
2) Simple subject. The part of the sentence 'parrot' is the simple subject.
Step-by-step explanation:
The part of the sentence 'parrot' is classified as the simple subject. The simple subject is the main noun or pronoun in the sentence that tells us who or what the sentence is about. In the sentence 'A green parrot sat on my shoulder,' the simple subject is 'parrot' because it is the main noun that the sentence is describing.