Final Answer:
A wiki is a Web site that allows people to post, add, edit, comment, and access information, including a database that keeps a history of all prior versions and changes. Therefore the final answer is d. wiki.
Step-by-step explanation:
A wiki is a website that allows people to post, add, edit, comment, and access information, including a database that keeps a history of all prior versions and changes. Unlike other options like a tweet, blog, chat, or microblog, a wiki is specifically designed for collaborative content creation and editing. Users can contribute to the information on a wiki, making it a dynamic platform that evolves with user input. This collaborative and iterative nature distinguishes a wiki from other forms of online communication.
In a wiki, pages are interconnected, forming a web of information where users can navigate through related topics seamlessly. The ability to track changes and view the revision history ensures transparency and accountability, making it a valuable tool for collaborative projects, knowledge sharing, and documentation. This stands in contrast to options like tweets, which are brief and one-way, or blogs that are more individualistic in nature.
Therefore the final answer is d. wiki.