Answer: Unsought service
Explanation:
According to the given question, the plumber's service is basically represent about the unsought services as in this type of service the customer are basically unaware about the products and the services due to some lack of interest and desire.
In the above given scenario, Andrea is basically unaware about the water pipes products so she is basically looking for service online so that the plumber comes on same day and repair her frozen water pipeline.
Therefore, Unsought service is the correct answer.