the answer is a because if the model is based on experimental data it wont be good unless it has been tested.
I just did it and got it correct the answer is inside the circle which is the first one. Good luck on the questions.
Shivering
Explanation: shivering action is an act to warm a homoeothermic body. Sweating makes the body cool, panting don’t keep body warm and dilating blood vessels does not keep body warm instead constriction of blood vessels is the initial process to conserve body heat followed by waves of muscle contraction, which is nothing but shivering. Alteration of the set point in torpor is also not the right answer
The life cycle stages of a plant would be seeds → germination→growth→maturity→pollination→fertilisation→seeds etc etc.
so I would say the life cycle stages not found in animals would be either pollination or germination.
I believe that the answer is B. a fertilized egg splits in two but I could be wrong