Answer:
“I have seen residents of Kathmandu Valley openly ... to control one of the major contributors to air pollution. ... the public to remain indoors and not to set a fire outside.
Explanation:
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The focus change is in the point of view; first, she thought that she did her first sale and was ready to do it, as nobody opened, she thought there was nobody at home. Then, she changed her point of view because she thought to return and that she wasn't a good salesperson, however, she knocked on the door again with a smile on her face.
If you’re talking about the story “Two Kinds” then it’s about the conflict of expectations/culture between daughter and mother.
The connotations of the words used in the passage