A conjunction is a word used to connect clauses or sentences or to coordinate words in the same clause (e.g., and, but, if).

A pronoun takes the place of a noun. 'Him' is used in place of the name of the person receiving the book, functioning as an object pronoun.

Adverbs modify verbs, adjectives, or other adverbs. 'Happily' modifies the verb 'sang' by describing how he sang, so it is an adverb.

A preposition indicates the relationship between a noun or pronoun and other words in a sentence. 'Under' shows the spatial relationship between the cat and the table.

An adjective modifies or describes a noun. In this sentence, 'red' describes the noun 'car', making it the adjective.

The word 'runs' expresses an action performed by the subject 'She'. Therefore, it functions as a verb in this sentence.

A noun is a word that functions as the name of a specific object or set of objects, such as living creatures, places, actions, qualities, states of existence, or ideas.

Order 2-3-1. Correct: 'You, he and I'.

Traditionally, 'Everyone' takes a singular possessive 'his'. Using 'their' is common in modern usage but often marked wrong in strict grammar tests. Correct: 'his duty'.

'Neither' is singular. Correct: 'was correct'.