The intricate structureof the compound insect eye, having hundreds of miniature eyes called ommatidia, help explain why scientists have assumed that itevolved independently of the vertebrate eye.
Here the noun'intricate structure ' is singular and hence needs a singluar verb form of'helps '.Eliminate answers A & D
Using the same logic, answers B & C end with the plural form 'they'. This is incorrect.Eliminate answers B & C
...
Here the noun'intricate structure ' is singular and hence needs a singluar verb form of'helps '.Eliminate answers A & D
Using the same logic, answers B & C end with the plural form 'they'. This is incorrect.Eliminate answers B & C
...
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