adjective
Sudden is an adjective.
The word "you" belongs to the pronoun word class, particularly as a second person singular pronoun. It is used to refer to the person or people being spoken to.
Ornithologist.
The word "saw" can be both a verb (past tense of see) and a noun (a tool used for cutting).
preposition
it's a preposition
Adjective
Sudden is an adjective.
It falls into the action category
If you mean the part of speech, it is a noun. If you mean the etymology, it comes from Greek.
The word "you" belongs to the pronoun word class, particularly as a second person singular pronoun. It is used to refer to the person or people being spoken to.
Ornithologist.
Tigers belong to Class Mammalia.
Opossums belong to the class mammalia.
A piranha belong to the Phylum Chordata, and the class Osteichthyes.
Sea fans belong to the class Anthozoa
Echidnas belong to the Class Mammalia and Order Monotremata.