Phishing is a type of social engineering attack. Social engineering attacks exploit human psychology to trick people into revealing sensitive information or clicking on malicious links. Phishing attacks typically involve sending emails or text messages that appear to be from a legitimate source, such as a bank or credit card company. The emails or text messages will often contain a link that, when clicked, will take the victim to a fake website that looks like the real website. Once the victim enters their personal information on the fake website, the attacker can steal it.

Malware, spyware, and denial of service attacks are all different types of cybersecurity attacks. Malware is software that is designed to harm a computer system. Spyware is software that is designed to collect information about a user's computer activities. Denial of service attacks are designed to make a computer system unavailable to its intended users.

Therefore, the correct answer is B. Social engineering.

Here is a table that summarizes the differences between phishing and the other three options: