Final answer:
Hacking describes the security concern of unauthorized computer access, whereas phishing involves deceiving users to obtain sensitive information, and is not directly related to unauthorized computer access.Option A is the correct answer.
Step-by-step explanation:
The security concern where a user deliberately accesses another user's computer without permission is described as hacking. Hackers use various methods such as exploits, malware, and social engineering to gain unauthorized access to systems and data. While phishing is a specific type of security attack where attackers lure individuals into providing sensitive information via deceptive emails or websites, it is not the correct term for unauthorized computer access. An e-card is a digital version of a greeting card and a security alert typically refers to a notification or warning about a security issue.
The security threat involving intentional unauthorized access to another user's computer is commonly known as hacking. Hackers employ diverse techniques like exploits, malware, and social engineering to breach systems. It's crucial to distinguish hacking from other threats; for instance, phishing involves deceiving individuals into disclosing sensitive information, not directly accessing their computers. An e-card is essentially a digital greeting card, unrelated to unauthorized access. A security alert typically denotes a warning or notification related to a security concern rather than the act of intruding into someone else's computer without permission.