A digital marketing team is evaluating their website's performance using a web analytics tool. For each of the following scenarios, identify which fundamental element of web analytics tools is primarily being utilized:
- Scenario I: Assessing the impact of a recent blog post by tracking the number of times it was viewed and the duration visitors spent on the page.
- Scenario II: Determining the effectiveness of a new checkout process by monitoring the number of completed purchases since its implementation.
- Scenario III: Customizing marketing emails based on the geographical location and past purchase behavior of website visitors.
- Scenario IV: Evaluating the immediate user response to changes made on the homepage layout.
Select the correct web analytics tool element for each scenario.