The answer is The general topic of a text
The Polish intelligence developed the "bomba", a complicated system of wires and rotors to scan and decode messages within hours. This one is the most suitable.
Reading task in a workplace and reading for personal or academic purposes have many similarities and differences. A difference is that when you read for a work place you need to be careful of what you are reading because if you miss something or skim through the information and make amistake it will affect your job and others around you or sometimes the people that you are helping. While reading for academic purpose it also is very important to be careful, but it will affect your grades and only affect you not anyone around you. Some Similarities is that for both you should never skim read anything, everything should be read very carefully.
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Setting is not a part of characterization.
The setting includes where the story takes place.