Coyotes who have been fed sheep carcasses that have been laced with a nausea-inducing poison are less likely to prey on sheep in the wild. This phenomenon is best explained by the classical conditioning phenomenon called .

taste aversion

Explanation:

Based on the information provided within the question it can be said that this is best explained by the conditioning phenomenon known as taste aversion. This phenomenon explains the occurrence of when an animal associates a certain taste with toxic, spoiled or poisonous substances and the symptoms they cause. Usually due to them having experienced those symptoms before.

the insertion of a penis into a vagina.