This classical conditioning process is known as spontaneous recovery, this process consisted in the reappearance of a conditional response that had disappeared.
The classic conditioning process indicates that we learn behaviors conditioned by situations we live in, in the case of Mariah is the fear of water, these behaviors can be maintained or extinguished, Mariah learned swimming to end her fear of water, but sometimes the learned behavior can appear after being extinguished and this is what is called spontaneous recovery.
