Final answer:
HTTPS provides the highest level of security.
Step-by-step explanation:
Out of the provided options, HTTPS (Hypertext Transfer Protocol Secure) provides the highest level of security.
HTTPS is the secure version of HTTP and it uses encryption to protect the data transmitted between a user's browser and a website. It ensures that the information is encrypted and cannot be intercepted or tampered with by attackers.
On the other hand, S-HTTP (Secure HTTP) is an older protocol that provides security at the application level rather than the transport level, making it less secure than HTTPS.