Answer:
Enter key.
Step-by-step explanation:
The key you have to press in order to send your finish information to the central processing unit (CPU) is the Enter key.
In Computer science, the Enter key found on all keyboards serves a similar purpose (function) as the OK button and it is typically used to end or finish an entry and sequel to that, starts the processing of the information entered into the computer system.
This ultimately implies that, when a computer user wishes to enter or send a finished information to the central processing unit (CPU), he or she is required to hit the Enter key.