This question is based on the following paragraph. The sentences are numbered to help you answer the question. (1) Scientists ge
nerally agree that Earth is getting warmer due to what's called the greenhouse effect. (2) A greenhouse stays warm because sunlight and heat coming through the glass roof are mostly trapped. (3) The heat doesn't radiate back into the atmosphere because it's held in by the glass. (4) Something like that happens on Earth. (5) The atmosphere acts like a blanket that keeps the Sun's heat from leaking away into space. What is the main conclusion you are to draw from this paragraph? A. The atmosphere is what keeps the planet warm. B. The greenhouse effect is changing Earth's atmosphere. C. The sun's heat can easily leak away out into space. D. Greenhouses help most plants to grow more quickly.
The correct option is A. From the passage given above, it can be seen that the author used the illustration of green house and its mechanism to show us the way in which the atmosphere works. The author wants us to see that just the way the glass capture the heat of sunlight and prevent it from escaping, the atmosphere works in the same manner by trapping the heat on earth preventing it from escaping, thus keeping the earth warm.<span />
The greenhouse effect is changing Earth's atmosphere is the main conclusion that you are to draw from this paragraph.
Explanation:
The excerpt is describing how do the greenhouses work and how do they keep the hit inside of them, then this process is compared with the natural reaction earth is having that mimic the same conditions of a greenhouse, in the line "Something like that happens on Earth." and the explanation that the atmosphere covers the role of the glass roof help you see this conclusion.
