The vague or unacceptable word in the following sentence is
do you want them roses?
a. do
b. them
c. you

B. them.

Explanation:

In any sentence, a vague or unacceptable word is any word that is used or put in a sentence but does no have any special or purpose in the sentence. It is not necessarily required in the sentence.

In the given sentence, the use of the word "them" to refer to the "roses" has no special purpose in the sentence. Rather, the sentence can well manage itself even without the word "them" in it. So, the vague or unacceptable word is "them".

because they were not just any seashells they were sally's seashells

(you didn't attach a copy of the poem, but i'm answering as best as i can)

since a simile compares two unlike things using like or as, it kind of gives an item the ability to do something it can't.

example: "the player was like a tiger on the field"

in this sentence, the simile conveys the idea that the player was fast and strong, like a tiger.