Which of the following is NOT an example of a shipping service?

Standard Insurance Service is not a shipping service; rather, it refers to a service related to providing insurance on shipped items. Shipping services are primarily focused on the transportation of goods from one location to another, whereas the role of insurance is to protect the value of those goods during transit. The other options listed, such as Priority Mail Express, Parcel Select, and Parcel Return Service, are all distinct shipping services offered by USPS that facilitate the sending and returning of parcels. Each of these services provides specific features and delivery options designed to meet various shipping needs, whereas Standard Insurance Service does not involve transportation but rather offers a protective measure for shipments.