Which sentence contains the appositive or appositive phrase that is not correctly punctuated?

a. you must be home by eight o'clock your curfew time.

b. the movie shrek is one of my favorites.

Appose is a word adopted in English language from the Latin diction. Moreover, an appositive is referred to as noun phrase which elaborates the meaning of the noun in the same sentence.

Proper punctuation must be utilized with appositive phrases. Any defining appositive phrase is separated with the help of commas. It can be used in the beginning, or in the middle, or at the end of the sentence. It is necessary to use commas as a separator to form a relationship with the subject, within the statement.

Example: Harry Potter, a gifted scholar, is Professor McOnigall's favorite.

However, in the asked query, appositive is carried in the first sentence, that is, "You must be home by eight o'clock your curfew time." The absence of comma breaks the structure and flow of the sentence. If we write- "You must be home by eight o'clock, your curfew time," this in return explains the importance of the phrase- "your curfew time". Else it seems useless in the statement.

The answer to your question would be that the sentence that contains the appositive or appositive phrase that is not correctly punctuated is the following one: You must be home by eight o' clock your curfew time.  That is, your answer would be A.

Explanation:

An appositive is a noun or noun phrase that renames another noun beside it. A nonessential appositive is always separated from the rest of the sentence with commas because the information it provides is not necessary for the sentence to make sense. The revised version of the sentence would be: You must be home by, eight o'clock, your curfew time.

i think the life is invaluable.

you can also say immeasurable.