The trick in this question is that human eye is not being compared with the insects eye, it is rather a certain feature capable of doing something is being compared with the insects eye.
So in order to make the correct comparision we need to compare both the features. Although I was initially tempted with A the Correct answer is D which compared the feature of human eye with insects eye and also has correct subject verb agreement.
So in order to make the correct comparision we need to compare both the features. Although I was initially tempted with A the Correct answer is D which compared the feature of human eye with insects eye and also has correct subject verb agreement.




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