The IP address is a network adaptor to other devices on the network, or answer A. The IP address is what address your computer or phone uses to get online. If you’ve ever seen something like NCIS or Criminal Minds, you know that it is often used to track hackers in these programs. This is harder to do in real life, since there are firewalls, privacy laws, subpoenas, and other items needed.
Regardless of what the IP address is used for as part of law enforcement, it’s simply the address of a specific device on a network. My father has used IP addresses to cut off wifi on our devices at a certain time because he wanted to cut off our internet so we would sleep, for example.