If a human had only one eye,then:

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(D) With two eyes,the field of view is wider (about $180^{\circ}$),which allows for a larger visible region. If a person has only one eye,the field of

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$(b)$ and $(c)$ both.

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(D) With two eyes,the field of view is wider (about $180^{\circ}$),which allows for a larger visible region. If a person has only one eye,the field of view is reduced. Furthermore,binocular vision (using two eyes) is essential for perceiving depth and three-dimensional images. With only one eye,the brain cannot compare two slightly different perspectives,so the ability to judge depth is lost. Therefore,both $(b)$ and $(c)$ are correct.

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