What’s a key difference between Google Analytics 4 properties and Universal Analytics properties?

Google Analytics 4 properties use “dimensions” as the foundation for data collection and reporting, while Universal Analytics uses “events” as the foundation for data collection and reporting.
Google Analytics 4 properties use “sessions” as the foundation for data collection and reporting, while Universal Analytics uses “events” as the foundation for data collection and reporting.
Google Analytics 4 properties use “events” as the foundation for data collection and reporting, while Universal Analytics uses “sessions” as the foundation for data collection and reporting.
Google Analytics 4 properties use “sessions” as the foundation for data collection and reporting, while Universal Analytics uses “dimensions” as the foundation for data collection and reporting.

The correct answer is:

Google Analytics 4 properties use “events” as the foundation for data collection and reporting, while Universal Analytics uses “sessions” as the foundation for data collection and reporting.