Which trait refers to a canine's resiliency toward unpleasant experiences?

The trait that refers to a canine's resiliency toward unpleasant experiences is hardness. This characteristic is associated with a dog's ability to withstand stress, adverse situations, or trauma without showing significant signs of distress or negative behavioral changes. A dog that possesses hardness is often not easily influenced by fear or discomfort, allowing it to perform reliably even under challenging conditions.

In contrast, the other traits do not encapsulate this specific aspect of a dog's adaptability to unpleasant experiences. Courage typically pertains to facing fear rather than enduring adversity, temperament refers more broadly to the overall disposition of the dog, and softness may indicate sensitivity or a more emotionally responsive nature rather than resilience. Therefore, hardness is the most appropriate choice when discussing a canine's ability to handle unpleasant experiences with tenacity and strength.