Expository writing is meant to inform a reader about a certain topic. Because of this, D is the correct answer.
Thesaurus will be most helpful because it will give you new words to use in your vocabulary it will express words in new ways which will in turn help your ideas be expressed differently
Personally, I would say that "The city is so big" best captures life in the city, because it describes how busy the city is, and how everything happens so fast it just rushes by. It explains that even people get lost in the wonder and chaos of the city, disappearing into life.
In paragraph 9, what the phrase "drew him on by artful questions" means is that he questioned him to try to gain privileged information.
He had to find out some information that was very important to him, so he started questioning him furtively so as to get to the bottom of things.
Standing water is not good for the environment so it needs to be vanished and shall no longer be around humans or animals that can catch the deadly disease malaria !
