LogicGuru1 wrote:
C is the unopposed winner
Insect gives 100 calorie; Catching insect requires bird to lose 40 calorie. (Finding insect, Flying, then chasing insect, then breaking its shell).
Birds net calorie gain from insect 100-40=60 calorie
Berries gives only 80 calories, But finding berry requires 10 calorie. Find a tree and hop and hop and eat as much as you like without any problem.
Birds Calorie gain from berries 80-10=70 calorie.
Therefore the songbird eats only berries to gain as much calorie as
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