Step-by-step explanation:
1. In unconditional stimulus the dog is excreting in the house at first. This here is a first time act.
2. Unconditional response is the dog owner screaming and beating the dog till he cowers.
3. Conditional stimulus is the dog owner shouting till he threatens to spank the dog
4. Conditioned response has to do with the dog already living in fear or fright.