Adjective :- Adjective are words or group of words that describes people, places or things. for example :- This is a tasty apple. In this example tasty is an adjective which tells us the quality of apple.

Adjective of Quantity : - Adjective of quantity indicates the amount or estimated amount of the noun or pronoun in the sentence. It does not provide information about exact numbers, it tells only the amount of noun in relative or whole terms . It shows how much of a thing is meant ; as, Eg . some , few , much , many , enough etc.

Examples :

• I ate some rice. Here , some is an adjective of quantity as it shows the estimated amount of rice 
• He showed much patience. Here , much is an adjective of quantity as it shows the number of patience he showed .

Rules to remember adjective of quantity : -

• Some- This adjective is used to signify quantity or degree in an affirmative sentence. For example- My mother asked me to buy some oranges.
• Any- This adjective is used to signify quantity or degree in a negative or interrogative sentence. For example- I shall not buy any oranges (Negative).
• Few- This adjective is used for objects which can be measured or counted.
• For example- I can see only a few birds in the sky.
• Little- This adjective is used for objects that cannot be measured or counted. For example- Sameer has little appreciation for hard work.

In the question : -

It is the world's largest group of islands forming a ten thousand islands chain. In this sentence , the correct adjective of quantity is a ten thousand islands as it is used to show the quantity of largest group of islands.

Thus , the Correct Option is D , which is a thousand islands .

Adjective :- Adjective are words or group of words that describes people, places or things. for example :- This is a tasty apple. In this example tasty is an adjective which tells us the quality of apple.

Adjective of Quantity : - Adjective of quantity indicates the amount or estimated amount of the noun or pronoun in the sentence. It does not provide information about exact numbers, it tells only the amount of noun in relative or whole terms . It shows how much of a thing is meant ; as, Eg . some , few , much , many , enough etc.

Examples :

• I ate some rice. Here , some is an adjective of quantity as it shows the estimated amount of rice 
• He showed much patience. Here , much is an adjective of quantity as it shows the number of patience he showed .

Rules to remember adjective of quantity : -

• Some- This adjective is used to signify quantity or degree in an affirmative sentence. For example- My mother asked me to buy some oranges.
• Any- This adjective is used to signify quantity or degree in a negative or interrogative sentence. For example- I shall not buy any oranges (Negative).
• Few- This adjective is used for objects which can be measured or counted.
• For example- I can see only a few birds in the sky.
• Little- This adjective is used for objects that cannot be measured or counted. For example- Sameer has little appreciation for hard work.

In the question : -

I waited for _____________________ minutes and then tried to call him again. In this sentence , the correct adjective of quantity that can be placed in the blank part is a few which is used to show the estimate number of minutes .

Thus , the Correct Option is D , which is a few .

Adjective : - An adjective is a word that modifies a noun or a pronoun. In general, the purpose of an adjective is to describe a noun or pronoun and provide more information about it.

Adjective of Quantity :- Adjective of quantity indicates the amount or estimated amount of the noun or pronoun in the sentence. It does not provide information about exact numbers, it tells only the amount of noun in relative or whole terms .

Example : - You have no sense . Here , no is an adjective of quantity as it shows that no one have sense .

In the question : -

1. She was brilliant enough to pass her exam. In this sentence , enough is an correct adjective of quantity that can be placed in the blank part as it shows the estimate amount of quantity that she was brilliant enough to pass the exam .

2. It is insufficient food for me. In this sentence , insufficient is a correct adjective of quantity as it shows the estimate amount of food .

Thus , the Correct Option is C, which is enough , insufficient .