Answer:
IMAP keeps email on an email server by default
Step-by-step explanation:
IMAP
This is a protocol where the messages received and the messages ended are stored in the server, this helps us when we want to access our email from any place.
POP3
This protocol store the messages in the server, but when we want to access to them, the server removes them, then only we can access to the email with the application, but we can change the configuration in the setting with the option Keep email on the server, but is not by default.