Which type of tort liability involves a failure to deliver the promised level of service?

The situation described relates to a type of tort liability that arises when there is a failure to meet the promised level of service, which is best categorized as a breach of warranty. Warranty involves an assurance that certain conditions or standards will be met, particularly in service delivery. When a service provider fails to uphold these promised standards, they can be held liable for breach of warranty. This primarily applies to situations where specific expectations about the quality or nature of a service were explicitly stated either verbally or in writing, and the failure to meet these expectations can lead to legal repercussions for the provider.

In contrast, negligent liability focuses on a breach of duty of care, which pertains to the failure to act as a reasonable person would in similar circumstances, without necessarily involving a specific promise of service. Intentional torts involve actions taken with intent to harm or wrongdoing, and product liability usually pertains to injuries or damages as a result of a defective product rather than service delivery. Thus, in this scenario, the answer aligns well with warranty as it addresses the failure related to a promised level of service.