I agree with the person above - I'd say the correct answer is B. The greenhouse effect is changing Earth's atmosphere.
A is incorrect because the excerpt says that the atmosphere keeps the Sun's heat from leaking away into space. C is incorrect because it is the greenhouse effect that keeps the planet warm. D is not even mentioned in the text, which means that only B is correct.
Answer:
B: 6
Explanation:
In an essay, the analytical paragraph is a body paragraph. It presents evidence in order to prove the thesis. When an analytical paragraph stands alone (is not in an essay), the topic sentence is the thesis.
1 : A
2 : D
3 : C
4 : B
5 : B
6 : C