You would call an 'essay' a serious or witty composition meant to briefly express ideas, views, feelings, or reactions to situations in life. This will make the correct answer C.
The answer is cornea…..lens. Most bending of light entering
the eye is bent by the cornea. The lens of the other hand adjusts this bending
further, to focus it squarely on the retina. This is why the focal point of the
lens can be adjusted by changing its shape.
