Answer: Probably the sentence “They needed ways to move around in the city.
Explanation: The paragraph would be fine without the sentence.
Answer:
The trend quickened after 1860 and continued throughout the 21st century as well.
Explanation:
this one because you are telling the same thing basically with the whole article and the last sentence.
b
Answer: Rivers
Explanation: i do not know what you want from this so uh i just took a stab at it
Trying too so hard for something not to happen just for it to happen anyway