A bova is an octopus. A dax is a donkey. Question: Which one of them lives under water? Answer: bova.
A wug is an elephant. A kiki is a grasshopper. Question: Which one of them has a short tail? Answer: wug.
A toma is a sparrow. A glorp is a spider. Question: Which one of them can fly? Answer: toma.
A blick is a budgie. A tufa is a donkey. Question: Which one of them can sing? Answer: blick.
A fep is a wren. A flib is an elephant. Question: Which one of them is a songbird? Answer: fep.
A zek is a zebra. A zup is a donkey. Question: Which one of them lives in jungles? Answer: zek.