Final answer:
Two-factor authentication provides an additional layer of security by requiring users to provide two pieces of evidence to prove their identity. This enhances security and makes it difficult for hackers to gain unauthorized access to an account.
Step-by-step explanation:
The security measure that provides an additional layer of security by further verifying one's access to an account is two-factor authentication. Two-factor authentication requires users to provide two pieces of evidence to prove their identity, such as a password and a unique code sent to their phone.
This extra step of authentication makes it much more difficult for hackers to gain unauthorized access to an account, even if they have obtained the password. Two-factor authentication is widely used by banks, email providers, and social media platforms to enhance security.
Other measures mentioned above such as using strong passwords, protecting personal information, and using anti-virus software also contribute to overall account security but may not directly provide an additional layer of verification like two-factor authentication.