The only reasonable answer I can see is
D. Ectothermic animals need the warmth before they can move around to hunt food.
I think it is because the cold air is more dense than the hot air so the less dense air which is the warm air rises
Answer:
A.) They are different species, despite their similar morphology.
Explanation:
Tadpoles has gills ...and after metamorphosis frog gets lungs and an additional skin / cutaneous respiration !
so answer is A
