Explanation

 "The cat is hiding under the table."

"under" correctly describes the position of the cat beneath the table.

(a) in – means inside something (e.g., in the box)

(b) on – means on top of something (e.g., on the table)

(d) between – used when referring to something in the middle of two objects

Explanation

"He is doing his homework now."

The present continuous tense is formed using:

$$text{am/is/are} + text{verb-ing}$$

Subject "He" takes "is", and the base verb becomes "doing".

Explanation

The past perfect tense is formed using:

had+past participle 

"had finished" →  past perfect

Other options:

(a) I have finished my work. → Present perfect

(b) I finished my work. → Simple past

(d) I was finishing my work. → Past continuous

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

Everyone should bring their own lunch.

"Everyone": is a singular pronoun that refers to a group of people.

While grammatically "everyone" is singular, "their" is used as a gender-neutral pronoun to refer to the group.

Explanation

"brown" is an adjective that correctly describes the noun "dog."

The other options are incorrect because:

loudly – adverb (describes how the dog barked)

quickly – adverb

runs – verb

Explanation

Use "whom" when it's the object of the verb or preposition.

In this sentence, the person is receiving the book (object of the verb give), so "whom" is correct

Verb: give

Subject: You

Object: whom

Explanation

"but" is used to contrast intention with inability.

I would go, but I don’t have time.

Explanation

"I like both apples and oranges."

The phrase "both ... and ..." is a correlative conjunction pair used to show the inclusion of two items.

Other options like "but", "or", and "so" do not fit grammatically or logically here.