Read this sentence from neil degrasse tyson's preface to his book the pluto files:

the pluto files chronicles and documents pluto's remarkable grip on the hearts and minds of the american public, the professionals, and the press.
why would this be considered an example of expository writing?

a. it reviews tyson's book and offers an opinion.
b. it informs the reader about the public's love of pluto.
c. it argues that people should not care so much about pluto.
d. it provides a fictionalized account of pluto's history.

Recently, crops of vegetables such as lettuce and green onions have been contaminated, while they are still on the farm, with bacteria that cause food poisoning. how will science influence the way the government responds to prevent an increase in food-borne diseases? because science has shown that lettuce and green onions are not nutritionally valuable, the government may pass laws that ban the sale of lettuce and green onions. because science has shown that there is no way to prevent bacterial contamination, the government may pass laws that punish businesses that buy lettuce and green onions. because science has shown that the washing of hands prevent the spread of infectious diseases among people, the government may pass laws that require hand washing by everyone who handles food. because science has shown there are ways to find the source of the contamination, the government may pass laws that require farm practices that reduce the contamination of lettuce and green onions.