• You should pull the Events Report.
• You should pull the User Acquisition Report.
• You should pull the Pages and Screens Report.
• You should pull the Tech Details Report.

The correct answer is: You should pull the Tech Details Report.

Explanation: To understand if user behavior on product detail pages varies across different devices, utilize the “Tech Details Report” to analyze user interactions on these pages while filtering by device type. This will help you identify any significant differences in user behavior, such as click-through rates or time spent on page, across devices like desktops, tablets, and mobile phones.

Read more here: https://support.google.com/analytics/answer/12980150