Oh, how dreadful that my mother had to undergo great pain. For ten months she guarded and carried me. After my birth, she took care that I should always be in dry place instead of damp, and cleaned my excretions; she gave me milk and fed me so that I have grown up. For all of this, I must repay her what I owe her, see to her feelings, be obedient to her and serve her. What writer wants to write about mother's love?

express a mother's unconditional love.

Explanation:

These lines are found in the Buddhist book of "Nirvana Sutra" and is believed to have said by Buddha himself to express a mother's unconditional love. It expresses the essence of filial piety, the act of being good and obedient towards one's own parents.

Buddha remarks how hard and dreadful experience that his mother had to undergo just to give birth to him and raise him up. He says that a mother's love for her child is unceasing and unconditional. Therefore, it is one's duty to honour and to be obedient to one's own mother in return for all she had gone through for him/her.

1. the relationship between a pronoun and its antecedent- reference

reference refers to the relationship between mainly pronoun and another unit of grammar- noun phrase or noun.

2. a singular noun naming a collection or group- collective noun.

collective noun refers to the kind of noun which refer to the name of people, thing or anything in collective. for instance bundle of sticks, herein 'bundle' is collective noun.  

3. a modifying clause whose subject and/or verb is implied- elliptical clause

it is a clause in which words are being left out. on the other hand, the missing word is understood due to the logic or pattern of the sentence.  

4. two or more nouns and/or pronouns serving the same grammatical function and followed by a pronoun that references one or all nouns- compound antecedent

compound antecedent refers to which is made up of two or more words which are joined by 'or' or 'and.'

5. an adjective clause introduced by a pronoun- relative clause.

relative clauses are the clauses which begin with the relative pronouns such as when, where, which, that or who. the noun that precedes, relative pronouns identify or define that noun.  

6. the word, phrase, or clause to which a pronoun refers- antecedent.

antecedents refers to the phrases, clauses or words which are replaced with one of the third personal pronouns.

the answer is b brothers