Me with part d? (it’s due tomorrow february 25th)

With the examples given, we do not know what "it" and "them" is that the speaker is referring to.  Without stating what "it" is, the meaning of the sentence is unclear.

Hope this helps!!

when the outside temperature is too cold, an endothermic animal can generate heat by shivering. endothermic animals must eat much more often than ectothermic animals since it takes energy to maintain a constant body temperature.