Hacker is a person who illegally breaks into a system or network without any authorization to destroy, steal sensitive data or to perform any malicious attacks.

Black hat hackers are:

-Individuals with extraordinary computing skills, resorting to malicious or destructive activities and are also known as crackers

-Individuals professing hacker skills and using them for defensive purposes and are also known as security analysts

-Individuals who aim to bring down critical infrastructure for a "cause" and are not worried about facing 30 years in jail for their actions

-Individuals who work both offensively and defensively at various times

Black hat hackers are:

Option (a) Individuals with extraordinary computing skills, resorting to malicious or destructive activities and are also known as crackers

Explanation:

Black hat hackers are the Individuals with extraordinary computing skills, resorting to malicious or destructive activities and are also known as crackers Black hat hackers hack the systems and websites unethically. Security analysts are the experts hired by the company to find the loop holes in the networks, websites and systems. They are Ethical Hackers not the Black Hat Hackers. Ethical Hackers find the vulnerabilities in the systems in order to make the systems more robust. Security analysts analyses the security of the systems and they defend the systems, networks and websites from the attacks. Security Analysts also detect the intrusions by hackers and do the after math after the attack in order to regain the control over systems. So, option (b) is false. Option (c) is false as the jail term can be anywhere more or less than 30 years and they may not work for a "cause". They work for monetary benefits. They are malicious. Option (d) is false. As the Black Hat Hackers are malicious they work for the destruction of the systems, websites and networks. So, they work Offensively. They don't defend the systems from the attacks. They are the attackers by themselves. They attack the systems by themselves.