In an effort to save an endangered australian marsupial called the northern quoll, researchers paired a nausea-inducing drug along with parts of the toxic toads that they quolls often eat. in this application of a phenomenon called the toxic toads are a(n)

The correct answer is - "conditioned taste aversion", and condition stimulus.

Explanation:

In this experiment, the researchers used Conditioned taste aversion or CTA phenomenon. CTA is taking place when an organism is associates the taste or property of a certain food with symptoms arise by a spoiled or poisonous substance.

CTA is normally developed by ingesting food that results in nausea, or vomiting like symptoms. In this case, toxic toads are called as the conditioned stimulus which is associated with the drug that is an unconditioned drug.

Thus, the correct answer is - conditioned taste aversion and conditioned stimulus.