Answer:
if you are talking about the nervous/worry pair then the answer is cause and effect.
The answer is B because "I have visited many cities including the following" indicates that there is going to be a list of cities. A colon is used to introduce a series of items or to separate two independent clauses; however the second sentence has to add on to the first.
Standard for means it is written in words: four hundred ans fifty would be the answer.
Estella is the main love interest.
