Final answer:
The basic model including both extended warranties and service plans is the Extended Warranty Model. This combines the provision of a basic warranty and the option to purchase an additional service contract for extended coverage. (Option 1).
Step-by-step explanation:
The basic model that includes both extended warranties and service plans is known as the Extended Warranty Model.
When purchasing items such as cars, appliances, or houses, sellers may offer a basic warranty which covers repairs or replacement for a certain period of time.
Moreover, they may also provide the option to purchase a service contract for an extra amount, which extends this promise and covers additional repairs or issues for a longer time period. (Option 1).