What is the main conclusion you can draw from this paragraph

Question

Scientist generally agree that Earth is getting warmer due to whats called the greenhouse effect. A greenhouse used for plants stays warm because sunlight and heat coming through the glass roof are mostly trapped. the heat doesn't radiate back into the atmosphere because it's partly trapped by the glass. Something like that happens on Earth. The atmosphere acts like a blanket that keeps the Sun's heat from leaking away into space.

 

A. The Suns heat can easily leak away into space

 

B. The atmosphere is what keeps earth warm

(Cant be B. because I got it wrong)

 

C. Greenhouse help most plants to grow more quickly.

 

D. The greenhouse effect is what changing the earth's atmosphere 

 

I think its either A or D but I'm not sure

Answer 1

"conclusion you can draw from this paragraph" is important because heat from Earth's core is ignored, as is heat generated by processes on Earth (for example, burning lots of fossil fuels, multiple billions of people and animals generating heat, trillions of machines generating heat, and massive wildfires).

 

So, "from this paragraph," you may conclude that the greenhouse effect is causing the Earth to get warmer (but, so are other items).  Answer B is true (Earth's heat would radiate into cold space without our atmosphere; consider our Moon with no atmosphere), but that's not what the paragraph is about.  This is how multiple choice questions are written (include some truth in the distractors, but make the key the only absolutely correct answer).

Answer 2

It can't be A. can you see why?  Look at the last sentence in the paragraph.  Doesn't that sentence say the opposite of choice A?  We know B is wrong.  C is not a good choice because the paragraph really is not about what makes plants grow.  So that leaves D which is the only one that makes sense here. 

Answer 3

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