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Snakes are not found in Antarctica, Iceland, Ireland, Greenland and New Zealand because 
(A) They are cold blooded
(B) They are carnivores
(C) They have poisonous fangs
(D) None of the above


Answer: A
Many carnivores are found in extremely cold areas.
Fangs are not affected by external temperatures hence they aren't contributing in the habitats of snakes.
They are cold blood or their inability to maintain a body temperature limits their existence to some areas having warm climates as they will not be able to survive in such extreme cold.
So the correct answer is 'They are cold blooded'.
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