question: frogs:water snakes:ectotherms
choices.label: A B C D
choices.text: crocodile:lizard:reptile dolphins:penguins:sea animals turtles:whales:amphibians antelope:lion:prairie animals
explanation: "ectotherms" include "frogs" and "water snakes"; "frogs" and "water snakes" are the same species. "reptiles" includes "crocodiles" and "lizards"; "crocodiles" and "lizards" are the same species. "penguins" are a kind of bird that lives on land and sea; "sea animals" does not include "penguins". "turtles" are marine animals, "whales" are mammals, and neither "sea turtles" nor "whales" are amphibians. "antelope" and "lion" are of the same kind, and they may or may not live in the "prairie". "prairie animal" does not include "antelope" and "lion".
relation: frogs water snakes R2.4
relation: crocodile lizard R2.4
relation: antelope lion R2.4