What is the function of "BCC" in email communication?

The function of "BCC" in email communication is to keep other recipients' email addresses hidden. BCC stands for "Blind Carbon Copy." When you add email addresses to the BCC field, those recipients will receive the email, but their addresses will not be visible to other recipients in the "To" or "CC" fields. This function is particularly useful for maintaining privacy, especially when sending an email to a large group of people who may not know each other. By using BCC, you prevent recipients from seeing a list of all the other email addresses the message has been sent to, thus safeguarding the personal information of those included. It also helps reduce the risk of spam as recipients cannot easily reply to all or utilize the addresses they see.

The other options focus on different aspects of email communication. Enhancing email security typically involves encryption and secure connections, which is not the primary purpose of BCC. Copying all recipients' addresses contradicts the purpose of BCC, which is to keep those addresses private. Categorizing emails relies on organizational features that do not pertain to the BCC functionality.