The only reasonable answer I can see is
D. Ectothermic animals need the warmth before they can move around to hunt food.
If your asking if you can prove everything by science then no but people will try they will give out theories and try to find solutions that they can't. And if your asking if your able to prove all things that happen/the explanations scientifically then the answer is no. Take how the world was made for example nobody knows how it is made. The scientists are trying to prove it was created by some big bang when in reality nobody really knows that's just a theory. One of many theories.
i think they are just trying to educate us the best way they can and trust me kids can make that quite hard on them so they use tactics to scare or annoy the kids
You forgot to attach an image there is not graph to look at
