Explanation

Box 1: No
Records are added, not updated.
Box 2: Yes
The Collect function adds records to a data source.
Syntax: Collect( DataSource, Item, ... )
DataSource - Required. The data source that you want to add data to. If it doesn't already exist, a new collection is created.
Item(s) - Required. One or more records or tables to add to the data source.
Box 3: No
No records are cleared.
Reference:
https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps/functions/function-clear-collect-clearcollect