Possessive adjectives: após o uso de algum deles (my, your, his, her, its, our, their), virá substantivo.

Possessive pronouns: após o uso de algum deles (mine, yours, his, her, its, ours, theirs), não tem substantivo.

Bons estudos.

Possessive Adjective, vem antes do substantivo. Your day.

Possessive pronoun, não tem substantivo, mas vem depois de verb to be. This day it is yours.

possesive adjective, pois acompanha um substantivo ´´day´´

The correct answer is C) It is a possessive adjective.

In English grammar, it is a common point of confusion, but there is a clear distinction based on how the word is used in a sentence.

A possessive adjective (my, your, his, her, its, our, their) is always followed by a noun that it modifies. In your sentence, "your" directly precedes and modifies the noun "day". It functions like an adjective because it provides more information about the noun (telling us whose day it is).

A possessive pronoun (mine, yours, his, hers, ours, theirs) replaces a noun entirely so that you don't have to repeat it. It never sits right before a noun.

• Possessive Adjective: "This is your book." (Followed by the noun book).
• Possessive Pronoun: "This book is yours." (Replaces the need to say your book).

• Object Pronoun (B): Words like me, you, him, her, us, them. (e.g., "I saw you.")
• Demonstrative Pronoun (D): Words like this, that, these, those. (e.g., "This is my day.")
• Subject Pronoun (E): Words like I, you, he, she, it, we, they. (e.g., "You had a long day.")