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Option 4 :    Climate change poses a threat to the survival of polar bears.

The correct answer is "Climate change poses a threat to the survival of polar bears."

  • Let us look at options one by one:
  • option (1)- It talks about "Climate change has caused Arctic summer to be short but temperature to be high". This statement is completely wrong. The author states that the size of whole Arctic ice present during the summer time is becoming shorter and shorter day by day not the time of summer. Hence, this statement is wrong.
  • Option (2)- This statement reads "Polar bears can be shifted to South Pole to ensure their survival." There is no mention of the idea of the polar bears being shifted to the South pole. Hence, this statement is wrong.
  • Option (3)- This statement reads "Without the presence of polar bears, the food chains in Artic region will disappear." This statement is true but clearly not the exact message what this passage is written for. In fact, this will be the effect of the endangered polar bears if they get submerged due to the melting of huge ice caps of Arctic ocean then the food chain will be affected. Hence, this statement is not the most crucial message of the passage.
  • Option (4)- This statement reads "Climate change poses a threat to the survival of polar bears." It is the most crucial message what the writer wants to say through the passage. The whole passage indicates about the rising of global temperature which is nothing but Climate change. This has resulted in early coming of summer melting of ice and late coming of winter freezing of ice, It has also increased the period of summer. Due to which Arctic ocean ice caps are melting more and more year by year and is posing a serious threat to the lives of 'polar bears" .As they are the one who resides above the sea caps may get submerged in the times to come if this problem is not kept in check. 
  • Hence, the correct answer is option (4).
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