Final Answer:
The term portal is best defined as: b. A website serving as a gateway or entrance to the internet.
Step-by-step explanation:
A portal, in the context of technology and the internet, refers to a website or platform that serves as a gateway or entrance point to various services, resources, and information. Option B accurately captures this definition. Portals are designed to provide users with access to a range of features, such as email, news, search engines, and other services, all in one centralized location. They act as a unified entry point, simplifying user navigation and interaction with online content.
Options A and C are not as precise in capturing the essence of a portal in the context of technology. Option D provides a definition more aligned with a fantasy or fictional concept rather than the technological meaning associated with portals.
Option B is the answer.