Explanation:
Box 1: Site design
If your business scenario doesn't align with any of the scenario-based templates, you can select one of the site design templates. They provide building blocks for you to create custom sites.
There are multiple variations of this template, each with different layout, images, and colors that can be used as-is or customized to meet your needs. You can see the full list of the available site design templates available by selecting the Site designs tab during the site provisioning process.
Box 2: Scenario-based
You can accelerate Power Pages site development by choosing a scenario-based template if your business requirements align with the solution included in the template.
You can select one of the following templates:
The after school program registration template if your scenario requires a registration site to create events and allow stakeholders to register.
The schedule meetings with a financial institution template if your site requires scheduling capabilities, view availability and schedule a meeting online.
*-> The building permit application template if you need to build a site to allow customers to submit applications and receive email notifications on the status of their application.
Box 3: Customer self-service
This template provides the ability for your customers to access self-service support resources, including a searchable knowledge base, activity updates, and feedback options.
Box 4: Blank page
Reference:
https://learn.microsoft.com/en-us/training/modules/power-pages-templates/generic
https://learn.microsoft.com/en-us/training/modules/power-pages-templates/scenario
https://learn.microsoft.com/en-us/training/modules/power-pages-templates/dynamics-365