-  ‘the habit of smoking’ in place of ‘habit of smoking’ 

In this sentence, the subject is "every man, woman, and child" and it is singular, so the verb "is" is correct in Part 2. Part 3 is also correct because "consequences" is plural and matches the verb "is".

However, in Part 4, the article "the" is missing before "habit of smoking". "The habit" refers to a specific habit that is being discussed, which is smoking in this case. Without "the", the sentence is incomplete and sounds awkward.

Therefore, the correct sentence would be:

"Every man, woman, and child is now aware of the terrible consequences of the habit of smoking."

Here are some relevant definitions and formulas to keep in mind while analyzing sentences for errors:

Subject: The subject of a sentence is the noun or pronoun that the sentence is about. It usually comes before the verb. In this sentence, the subject is "every man, woman, and child."

Verb: The verb is the action word or state-of-being word in the sentence. In this sentence, the verb is "is."

Article: An article is a word that comes before a noun and indicates whether the noun is specific or general. "The" is a definite article, indicating that the noun it modifies is specific. "A" and "an" are indefinite articles, indicating that the noun is general.

Agreement: Subject-verb agreement is the grammatical rule that requires the verb to agree with the subject in number. If the subject is singular, the verb must also be singular. If the subject is plural, the verb must also be plural.

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