Which change, if any, is needed to revise the underlined text? spirits, therefore,
(The full sentence is, “ Blue is considered especially effective at capturing and destroying spirits, therefore, blue glass bottles were especially desirable.”

1. spirits, therefore;
2. spirits; therefore
3. spirits; therefore,
4. No change

I think it's the third option

the use of “as” in the example to draw the resemblance. some more examples of common similes are given below. common examples of simile. our soldiers are as brave as lions. her cheeks are red like a rose. he is as funny as a monkey. the water well was as dry as a bone. he is as cunning as a fox. simile introduces vividness into what we say.

faith or loyalty when pledged in a solemn agreement or undertaking.