Concept:Birds are homeotherms, while lizards are ectotherms whose body temperature tends to follow the environment.Explanation:From the graph, the bird’s body temperature remains relatively stable, whereas the lizard’s body temperature changes considerably with environmental temperature.So the bird’s body temperature varied less than that of the lizard during changes in environmental temperature.Option C is too absolute because the bird’s temperature may not be perfectly constant under all conditions.Answer:B. The body temperature of the bird varied less than that of the lizard during changes in environmental temperature.
