Final answer:
The website www.opinionsaboutbears.com is likely to contain personal opinions on bears, whereas other listed URLs suggest more fact-based information.
Step-by-step explanation:
The web address that will most likely provide opinions rather than researched facts is www.opinionsaboutbears.com. The domain name suggests that it contains personal opinions about bears, which may not be based on rigorous research or scientific facts. In contrast, the other domain names such as www.bearfacts.com, www.nationalparkresearch.com, and www.lakeblueskyfacts.com imply a more factual and research-oriented content that may include statistical data, research findings, or educational material provided by experts or park authorities.