Which code sample is required to use a custom tag provided in SiteGenesis inan ISML template?

A developer is given the requirement to add a step to the existing business logic of the registration process. How should the developer modify the route that handles the customer registration?

Which method is efficient and scalable because it uses the product search index rather than searching the database?

Which line of code creates a content slot that can be included on homepage.ismlto display on the home page?

Given the requirements:
* To integrate with an external web service using HTTP requests
* To create a service for this purpose with the Service framework using the LocalServiceRegistry class.
* To test the service before the external service provider makes the API available Which solution allows the developer to satisfy the requirements?