Explanation
Graphical user interface, text, application, email Description automatically generated

Box 1: No
The Collect function adds records to a data source. If the data source doesn't already exist, a collection is created.
Box 2: Yes
Box 3: No
Use the Set function to set the value of a global variable, which temporarily holds a piece of information, such as the number of times the user has selected a button or the result of a data operation.
Reference:
https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps/functions/function-clear-collect-clearcollect
https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps/functions/function-set