Question: According to paragraph B, what do researchers say about artificial light and the fall in insect numbers?
A It is the main cause.
B It is one of several causes.
C There is no clear connection.
D It mainly affects moths.
Key words in the stem: researchers, insect numbers. The last sentence of paragraph B says light “contributes to the decline… although… it is only one factor among several”. My own answer: one cause among others. → B
Naming the traps: A is too extreme (the text says one factor, not the main one). C is the opposite: researchers suspect a connection. D uses a word from the paragraph (moths), but the text never says light mainly affects moths: not in the text.
Question: What is the writer's main point in paragraph E?
A Light pollution is impossible to reduce.
B The technology for reducing light pollution is not yet available.
C Changing people's attitudes may be the biggest challenge.
D Coastal towns have solved the problem of light pollution.
The paragraph lists easy technical solutions, then ends: “The difficulty is less technical than social… persuading them… may prove harder than changing the lamps.” → C. A and B are opposite (the paragraph says light pollution can be reduced “almost immediately”). D is too extreme: some towns dim their lights during one season; nothing is solved.