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 : -

Some property of lead is its softness and resistance. In this sentence , the correct adjective of quantity is Some property as it is used to show the estimated number of property of lead .

Thus , the Correct Option is A , which is some property .

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 : - He has lost all his wealth. Here , all is an adjective of quantity as it shows that he lost his complete wealth .

In the question : -

1. They do not have enough team spirit to win the competition. In this sentence , enough is an adjective of quantity as it shows the capacity that the team has enough spirit to win the competition .

2. There has been a substantial change in the exam paper since the new teacher has come. In this sentence , substantial is an adjective of quantity as it shows the considerable amount of change in the exam paper since the new teacher has come .

3. My speech was heard by every single student in the courtroom very attentively. In this sentence , single is an adjective of quantity as it shows only one student in the courtroom heard the speech attentively .

Thus , the Correct Option is C , which is enough , substantial , single .

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. Adjectives provide answers to questions such as “What kind?” “Which one?” and “Whose is it?”

Adjective of quantity : - It 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 : - He showed much patience. Here , much is an adjective of quantity as it shows the estimated amount of patience he showed .

In the question : -

She had played alone for her _______ childhood. 

In this sentence , whole is a correct adjective of quantity that can be placed in the blank part as it shows the complete childhood she had played alone .

Thus , the Correct Option is C , which is whole .