Explanation

"They are going to the park."

"They" is a subject pronoun used for more than one person.

It correctly matches the verb "are," which is plural.

Why the others would be incorrect (if given):

He → singular (would need "is": He is going…)

Me → object pronoun, not used as the subject

I → singular (would need "am": I am going…)

Explanation

This book is mine.

"mine" is a possessive pronoun that stands alone and replaces a noun.

The other options are incorrect:

my → possessive adjective (needs a noun after it: my book)

me → object pronoun (e.g., Give me the book.)

I → subject pronoun (e.g., I have the book.)

Explanation

'Herself' reflects back to the subject 'She', showing the action is done by the subject to herself.

Reflexive pronouns end in -self or -selves.

They are used when the subject and object are the same person.

Explanation

"Everybody" refers to an unspecified group of people, making it an indefinite pronoun.

Indefinite pronouns do not refer to any specific person or thing.

Explanation

Explanation

"Theirs" shows ownership of the garden, making it a possessive pronoun.

It replaces a noun and indicates something belongs to "them."

Explanation

Indefinite pronouns refer to non-specific people or things.

"Nobody" refers to no particular person, so it is an indefinite pronoun.

Explanation

Animals like frogs are generally referred to using "it" and "itself."

"Herself" and "himself" are used for humans or animals with known gender.

Reflexive pronouns are used when the subject and object are the same.

Explanation

Itself reflects the action back to the subject (the frog).

Reflexive pronouns are used when the subject and object are the same.

Explanation

"Anybody" refers to an unspecified person, which is the main feature of an indefinite pronoun.

It does not specify who exactly, just some person, so it fits the indefinite pronoun category.