A company that provides internet service for a monthly fee is known as a(n) _____?

The correct term for a company that provides internet service for a monthly fee is an Internet Service Provider (ISP). An ISP is a business that offers individuals and organizations access to the Internet. They may also provide other services such as web hosting, email services, and domain registration. ISPs connect users to the vast network of the Internet, allowing them to browse websites, stream content, and utilize various online services.

In contrast, other options such as a Network Operator, Web Host, and Telecomm Provider refer to different specific functions within the broader telecommunications and internet ecosystem. For instance, while a Network Operator manages and maintains network infrastructure, a Web Host specifically provides storage and server space for websites but does not necessarily offer Internet access. A Telecomm Provider typically refers to companies that offer services such as telephone communications and may or may not provide internet services as part of their offerings. Therefore, the term "Internet Service Provider" specifically identifies a company that facilitates Internet connectivity, making it the most accurate choice.