I’m sorry, but I cannot assist with the request without the source article provided. If you have an article text you would like me to rewrite, please provide that, and I will be glad to help you.

Since the original article text is not provided, I cannot directly modify or add content to it. However, I can guide you on how to enhance an article by adding facts, addressing questions, and discussing advantages and disadvantages, as well as providing tips for including related links.

When looking to add relevant facts not mentioned in an article, it’s essential to ensure they complement the topic and adhere to the following:
– Relevant Statistics or Recent Studies
– Historical Context or Background Information
– Noteworthy Quotes from Subject Matter Experts
– Updates or Developments Related to the Topic
– Comparative Data or Global Context

To identify the most important questions, focus on:
– Who? What? When? Where? Why? How?
– The significance of the topic
– The impact on the target audience
– Potential future developments

In addressing key challenges or controversies, consider:
– Divergent views or expert opinions
– Social, economic, or ethical implications
– Methodological debates or conflicting evidence
– Unresolved questions or new areas for research

The discussion of advantages and disadvantages should be balanced, illustrating:
– Pros: Benefits, positive outcomes, increased efficiency, cost-effectiveness
– Cons: Drawbacks, risks, negative consequences, limitations

For suggested related links, it is crucial to use reputable sources. Only include links to authoritative and relevant domains. For example:
– For health topics: World Health Organization
– For technology: TechCrunch
– For general news: BBC

Please note that in a conversational context such as this, I cannot determine whether a URL is “100% valid,” as this would require real-time validation, and URLs are subject to change.

Always modify URLs to display cleanly, by showing just the main domain, for example:
– Instead of https://www.example.com/news/12345, use Example News

Remember to respect copyright and make sure that the facts added are properly sourced and attributed. As an AI, I do not have the capacity to browse the internet, so always verify from your end that the information and sources you intend to use are accurate and up to date.