Which is true about pop3 and imap for incoming email?
both keep email on an email server by default
imap keeps email on an email server by default
neither keep email on an email server by default
pop3 keeps email on an email server by default.

Option A: Both POP3 and IMAP  keep email on an email server by default.

is the correct answer.

Explanation:

Following points will make the idea of POP3 and IMAP clear:

POP3:POP3  is the acronym for Post Office Protocol 3.POP3 is the method of receiving emails in which the emails received on the app can be downloaded on to the computer by having an internet connection.These downloaded emails can be viewed offline whenever needed and managed as well.POP3 makes it possible that the storage space of the default server do not run short as the downloaded emails are deleted from the server.IMAP:IMAP stands for Internet Message Access Protocol.It is the method in which the mails are viewed and managed directly on the internet server instead of downloading them on the computer.IMAP makes sure to manage the mails so carefully and timely so that unimportant mails are deleted to make sure that the storage space does not run short.Conclusion:

So from these points we can make sure that both ways keep emails on email server but POP3 have option to download mails from server while IMAP dont have.

I hope it will help you!