Explanation

Box 1: Power Automate
Ensure that notifications are sent to the sales team when a lead is added by using Slack Power Automate is a service that helps you create automated workflows between your favorite apps and services to synchronize files, get notifications, collect data, and more.
Box 2: Business rule
A trigger must be created that changes the Priority field to 1 in the Account record 10 days after an account record is created.
A field named Priority_Trigger must be created to trigger the Priority field.
Business rules provide a simple interface to implement and maintain fast-changing and commonly used rules.
Box 3: Business process flow
Ensure that leads have a review stage added to the sales process.
Use business process flows to define a set of steps for people to follow to take them to a desired outcome.
These steps provide a visual indicator that tells people where they are in the business process.
Reference:
https://docs.microsoft.com/en-us/power-automate/
https://docs.microsoft.com/en-us/dynamics365/customerengagement/on-premises/customize/create-business-rule
https://docs.microsoft.com/en-us/power-automate/business-process-flows-overview