premise: a mountain chorus frog is a kind of animal sent2: polluting means something poisonous is added to an environment sent3: pollutions in animals habitat can cause the population of animals to decrease sent4: bodies of water are the habitats for aquatic animals sent5: a body of water is a kind of environment sent6: a frog is a kind of aquatic animal sent7: a mountain chorus frog is a kind of frog.
hypothesis: poisonous things added in water can cause the population of mountain chorus frogs to decrease