Question

a computer firewall is:
a fireproof case that protects your computer from heat
security software that protects your computers from hackers
software that reduces the temperature of your computer
a router that cannot be hacked

Explanation:

A computer firewall is a security system (software or hardware - based, often software) that monitors and controls incoming and outgoing network traffic based on security rules. It is designed to protect computer systems from unauthorized access, including from hackers. The first option is incorrect as a firewall has nothing to do with heat protection. The third option is wrong as it doesn't reduce temperature. The fourth option is incorrect as routers can have firewalls but a firewall itself isn't a non - hackable router, and the core function of a firewall is security against unauthorized access like from hackers.

Answer:

B. security software that protects your computers from hackers