Question

Bats can fly in the dark, because -; 1) They have better vision in the dark; 2) The pupils of their eyes are very big; 3) They are guided by ultrasonic waves produced by them; 4) None of the above

Answer 1

They are guided by ultrasonic waves produced by them is your answer

Answer 2

3) They are guided by ultrasonic waves produced by them;

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Bats can fly in the dark, because - They are guided by ultrasonic waves produced by them;