Consider the following use cases:
- Use Case I: A business wants to integrate a feature in their app to analyze user engagement with their marketing emails.
- Use Case II: An app developer needs to track which specific in-app action was taken as a result of clicking an ad.
- Use Case III: A company aims to monitor when a user completes a purchase after clicking on a promotional link on their website.
- Use Case IV: A marketing team is looking to understand how users interact with different elements on their website.
Select the correct Growth Stack solution for each use case.