Which of the following sentences exhibits proper parallelism?
a. science may be challenging, but it has rewards; reading might take up a lot of your time, but it is also enlightening.
b. science may be challenging, but it is also rewarding; reading might be time-consuming, but it is also enlightening.
c. science is very challenging, but it rewards the people who study it; reading is time-consuming, and it enlightens you.
d. science challenges, but it is also rewarding; reading is time-consuming. it is also enlightening.

The sentence with the best elements of parallelism of the examples provided is Option B.  Science may be challenging, but it is also rewarding; reading might be time-consuming, but it is also enlightening.

Explanation:

Parallelism is a property of the way your sentences are structured in a piece of writing. It is usually a property that is particularly important when providing lists in something you write.  All points on a list should start with a word in the same format, i.e. the listed elements should all start with a noun -- or a verb, if that is the case -- but not a mixture of those two elements.  You see this mistake a lot on peoples resumes when they are listing things.  Option B is best because "reading" is treated like the noun "science" in this case.  Another example of the work "reading" being treated like a noun would be: "I have done the reading." Both sentences use the verb in the present progressive form in the second independent clause ending each sentence. That is another way they are parallel.  There are other grammatical similarities that could be considered parallelsim in this example too!

both the address and the poster use diction to convey their message. diction is defined as a style of writing or speaking based on the types of words chosen in order to send a message. parallelism is when a similar sentence structure is used for several sentences on a text; roosevelt's address doesn't follow that. repetition has to do with repeating a word or sentence in order to emphasize and idea, however neither the poster nor the address use repetion. finally, the address doesn't use images to convey a message.

explanation:

you only need simple sentences to answer this. just answer these questions.

what do you think annie thinks of the mother? do you think annie believes the mother is a fit mother for helen.

what about the father? what would annie think of him? she might not like him, but does she respect him.

how about the son? would annie think he is the only voice of sanity in an insane place?

what about helen herself? this is the key question. how does she see helen? what do you suppose she thought her first job was going to be.

these aren't hard questions. just state the obvious. annie is not that well educated: she just knows what she has to do. write it that way.

you can do it if you've read the book or seen the play or movie.