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 />
Answer:
If everyone died, no one survived...
