Urban (city) areas rely on food from rural (countryside) areas because in urban citites, there aren't a lot of backyards. People stay in tall apart building built on concrete. There are a lot of streets and sidewalks. Downtown is an urban area. When you go downtown, you don't get much grass and certainly not much open area to grow crops.
D.it refers to God's will and power
the spider catching a fly represent Satan and his schemes to entrap men in sin, however God can easily break Satan's Web and save man.
Victor assaults his investigations with excitement and, overlooking his public activity and his family far away in Geneva, gains quick ground. Later, Ardently dedicating himself to this work, he ignores everything else; family, companions, studies, and public activity, and becomes progressively pale, desolate, and fixated.
These are two different verbs: one means: to be positioned horizontally (lie) and the other to position something else horizontally, to put something down (lay)
They sound similar and have a meaning connected to being horizontal, that's one reason for their confusion.
Make sure you also don't confuse their past tenses:
Lay: laid
lie: lay
Yes, Lay is the present tense of one of them and the past of the other: that's the other reason for their confusion!
