Answer:
Zinsser develops his central ideas by organizing his essay with details from memoirs written by his father, his students and himself.
The word decision is an <u>abstract noun.</u>
It is abstract because it cannot be touched or felt - it just exists, the same way love or hatred (which are also abstract nouns) exist.
Collective nouns are nouns such as council, jury - where one word is used to denote many parts which are included in it. Proper nouns are names. Compound nouns are made up of two or more words, such as brother-in-law, etc.
Its about a guy and girl falls in love