Give an example for:
$(a)$ An endothermic animal
$(b)$ An ectothermic animal
$(c)$ An organism of benthic zone

(N/A) Endothermic animal: Birds (e.g.,crows,pigeons) and mammals (e.g.,humans,cows) are endothermic animals that maintain a constant body temperature.
$(b)$ Ectothermic animal: Fishes (e.g.,sharks),amphibians (e.g.,frogs),and reptiles (e.g.,snakes,lizards) are ectothermic animals whose body temperature changes with the ambient environment.
$(c)$ Organism of benthic zone: Benthic organisms live at the lowest level of a body of water. Examples include starfish,sea anemones,and certain decomposing bacteria.