Final answer:
Antivirus software is a type of software program that protects your computer from virus attacks. Firewalls, encryption tools, and operating systems serve different functions in computer security.
Step-by-step explanation:
The correct answer is A) Antivirus software. Antivirus software is a type of software program specifically designed to protect your computer from virus attacks. It scans your files and emails for any malicious software and removes or quarantines them to prevent damage to your computer.
Firewalls, on the other hand, are a type of network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. They act as a barrier between your computer and the internet, helping to block unauthorized access and protect your computer from hackers.
Encryption tools are software programs that encode data to create encrypted messages or files, making them unreadable to anyone who does not have the correct decryption key.
Operating systems are software programs that manage all the hardware, software, and user interactions on a computer. While some operating systems may have built-in security features, they are not specifically designed to protect against virus attacks in the same way that antivirus software does.