Juan is planning an investigation about natural reserves. which of these is most likely to be a reliable source of scientific information on the internet

It depends on the credibility and reliability of the said source. Thus, a primary source is a type of obtaining or sourcing information after the phenomenon occurred at that particular time and when photographs are the first-hand materials that were able to capture that specific moment which then can convey the information. Primary resources also include - newspapers, journal articles, magazines and etc. These information are very vital for its credibility and reliability.