Concept:A valid email address consists of an email prefix and an email domain, both in acceptable formats. The prefix appears to the left of the @ symbol. The domain appears to the right of the @ symbol. For example, in the address [email protected], "name" is the email prefix, and "website.com" is the email domainThe three parts of an Email Address are:Username - The first part of an email address is the username.@ Symbol - An œat, or œ@, symbol is the second part of an email address.Domain - The last part of an email address is the domain, which can be broken down into two portions: the mail server and the top-level domain.Hence Option 2 is correct