Craft and StructureEasyMain purpose of an explanation of eyeshine
Craft and Structure practice question
A cat's eyes seem to shine in the dark because of a reflective layer behind the retina. Light that passes through the retina without being absorbed bounces off this layer and back through the retina, giving the cat a second chance to see it in dim light. The glow we notice is that reflected light escaping the eye.
What is the main purpose of the text?
- A. To explain why a cat's eyes appear to shine in the dark.Correct
- B. To argue that cats see better than dogs.
- C. To describe the structure of the retina in detail.
- D. To compare the eyes of cats and humans.
Answer: A. To explain why a cat's eyes appear to shine in the dark.
The text answers the question in its first words — why the eyes shine — with the mechanism.
Why the other answers are wrong
- B. To argue that cats see better than dogs.
- Dogs aren't mentioned.
- C. To describe the structure of the retina in detail.
- The retina is mentioned only in passing.
- D. To compare the eyes of cats and humans.
- Human eyes aren't discussed.
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