In order for a frog's visual "bug-detector" to work, the bug must be: _____________?
Correct answer: D. moving
- A. colored
- B. coming closer to the frog
- C. stationary
- D. moving
Explanation
A frog’s visual bug detector responds especially to movement, helping the frog detect prey against a background. A stationary object is less likely to trigger this specialised detection system.
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