preposition
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).
The word "the" is a definite article and is used to specify a noun as something that is known or has been previously mentioned.
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.
Sea fans belong to the class Anthozoa
A piranha belong to the Phylum Chordata, and the class Osteichthyes.
Echidnas belong to the Class Mammalia and Order Monotremata.